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Taxon author: Urb.

ITIS records citing taxon author "Urb."
 
 Kingdom Animalia
  Acanthognathus poinari Baroni Urbani, 1994 -- valid
  Aequorea victoria (Murbach and Shearer, 1902) -- valid -- water jellyfish, water jellyfish
  Alloscirtetica alvarengai Urban, 1971 -- valid
  Alloscirtetica chilena Urban, 1971 -- valid
  Alloscirtetica clypeata Urban, 1971 -- valid
  Alloscirtetica giacomeli Urban, 1977 -- valid
  Alloscirtetica grafi Urban, 1977 -- valid
  Alloscirtetica lanosa Urban, 1971 -- valid
  Alloscirtetica larocai Urban, 1977 -- valid
  Alloscirtetica marinonii Urban, 1977 -- valid
  Alloscirtetica mielkei Urban, 1977 -- valid
  Alloscirtetica mourei Urban, 1977 -- valid
  Alloscirtetica oliveirae Urban, 1977 -- valid
  Alloscirtetica sakakibarai Urban, 1977 -- valid
  Almyracuma N. S. Jones and Burbanck, 1959 -- valid
  Almyracuma proximoculi N. S. Jones and Burbanck, 1959 -- valid
  Amblyopone besucheti Baroni Urbani, 1978 -- valid
  Amblyopone gaetulica Baroni Urbani, 1978 -- valid
  Amblyopone ophthalmica Baroni Urbani, 1978 -- valid
  Amblyopone pertinax Baroni Urbani, 1978 -- valid
  Amyadenium beauchampi Gourbault, 1969 -- invalid
  Anochetus corayi Baroni Urbani, 1980 -- valid
  Anthidiellum azteca (Urban, 2001) -- valid
  Anthidiellum bolivianum (Urban, 2001) -- valid
  Anthidiellum xilitlense (Urban, 2001) -- valid
  Anthidium alsinai Urban, 2001 -- valid
  Anthidium danieli Urban, 2001 -- valid
  Anthidium igori Urban, 2001 -- valid
  Anthidium isabelae Urban, 2004 -- valid
  Anthidium larocai Urban, 1997 -- valid
  Anthidium loboguerrero Urban, 2004 -- valid
  Anthidium luizae Urban, 2001 -- valid
  Anthidium masunariae Urban, 2001 -- valid
  Anthidium rafaeli Urban, 2001 -- valid
  Anthidium rozeni Urban, 2001 -- valid
  Anthidium sertanicola Moure & Urban, 1964 -- valid
  Anthidium tarsoi Urban, 2001 -- valid
  Anthidium toro Urban, 2001 -- valid
  Anthodioctes affinis Urban, 2003 -- valid
  Anthodioctes analuizae (Urban, 1998) -- valid
  Anthodioctes angelicae Urban, 1999 -- valid
  Anthodioctes argentinus Urban, 1999 -- valid
  Anthodioctes ayalai Urban, 2002 -- valid
  Anthodioctes camargoi Urban, 1999 -- valid
  Anthodioctes cerradicola Urban, 1999 -- valid
  Anthodioctes chiribogae Urban, 1999 -- valid
  Anthodioctes claudii Urban, 1999 -- valid
  Anthodioctes costaricensis Urban, 1999 -- valid
  Anthodioctes fasciatus (Urban, 2007) -- valid
  Anthodioctes flavoalveolatus (Urban, 2007) -- valid
  Anthodioctes foersteri (Urban, 1998) -- valid
  Anthodioctes gracilis Urban, 1999 -- valid
  Anthodioctes guiomardi Urban, 2003 -- valid
  Anthodioctes langei Urban, 1999 -- valid
  Anthodioctes lourdes Urban, 1999 -- valid
  Anthodioctes manauara Urban, 1999 -- valid
  Anthodioctes meridionalis Urban, 1999 -- valid
  Anthodioctes misiutae Urban, 2002 -- valid
  Anthodioctes moratoi Urban, 1999 -- valid
  Anthodioctes navarroi Urban, 1999 -- valid
  Anthodioctes panamensis (Urban, 1998) -- valid
  Anthodioctes peruvianus (Urban, 2007) -- valid
  Anthodioctes rosanae Urban, 2002 -- valid
  Anthodioctes salvatoris Urban, 1999 -- valid
  Anthodioctes sanmartinensis Urban, 2004 -- valid
  Anthodioctes santosi Urban, 1999 -- valid
  Anthodioctes schlindweini (Urban, 2007) -- valid
  Anthodioctes shilcayensis Urban, 2004 -- valid
  Anthodioctes sioneii Urban, 1999 -- valid
  Anthodioctes speciosus Urban, 1999 -- valid
  Anthodioctes vilhenae Urban, 1999 -- valid
  Anthodioctes xilitlae Urban, 1999 -- valid
  Anthophora brasiliana Urban & Melo, 2005 -- valid
  Anthophora chulumani Urban & Melo, 2005 -- valid
  Anthrenoides admirabilis Urban, 2005 -- valid
  Anthrenoides affinis Urban, 2007 -- valid
  Anthrenoides albinoi Urban, 2005 -- valid
  Anthrenoides alineae Urban, 2008 -- valid
  Anthrenoides alvarengai Urban, 2007 -- valid
  Anthrenoides antonii Urban, 2005 -- valid
  Anthrenoides araucariae Urban, 2005 -- valid
  Anthrenoides birgitae Urban, 2008 -- valid
  Anthrenoides bocainensis Urban, 2007 -- valid
  Anthrenoides caatingae Urban, 2006 -- valid
  Anthrenoides calderensis Urban, 2009 -- valid
  Anthrenoides cearensis Urban, 2006 -- valid
  Anthrenoides cordobensis Urban, 2009 -- valid
  Anthrenoides corrugatus Urban, 2005 -- valid
  Anthrenoides cyphomandrae Urban, 2005 -- valid
  Anthrenoides deborae Urban, 2006 -- valid
  Anthrenoides densopunctatus Urban, 2005 -- valid
  Anthrenoides digitatus Urban, 2007 -- valid
  Anthrenoides elegantulus Urban, 2005 -- valid
  Anthrenoides elioi Urban, 2008 -- valid
  Anthrenoides falsificus Urban, 2007 -- valid
  Anthrenoides faviziae Urban, 2005 -- valid
  Anthrenoides flavomaculatus Urban, 2007 -- valid
  Anthrenoides francisci Urban, 2008 -- valid
  Anthrenoides gibberosus Urban, 2009 -- valid
  Anthrenoides gibbosus Urban, 2008 -- valid
  Anthrenoides glossatus Urban, 2007 -- valid
  Anthrenoides guarapuavae Urban, 2005 -- valid
  Anthrenoides guttulatus Urban, 2005 -- valid
  Anthrenoides jordanensis Urban, 2007 -- valid
  Anthrenoides kelliae Urban, 2008 -- valid
  Anthrenoides labratus Urban, 2007 -- valid
  Anthrenoides langei Urban, 2005 -- valid
  Anthrenoides larocai Urban, 2005 -- valid
  Anthrenoides lavrensis Urban, 2007 -- valid
  Anthrenoides magaliae Urban, 2005 -- valid
  Anthrenoides meloi Urban, 2005 -- valid
  Anthrenoides micans Urban, 1995 -- valid
  Anthrenoides neffi Urban, 2009 -- valid
  Anthrenoides nordestinus Urban, 2006 -- valid
  Anthrenoides ornatus Urban, 2005 -- valid
  Anthrenoides palmeirae Urban, 2005 -- valid
  Anthrenoides paolae Urban, 2005 -- valid
  Anthrenoides paranaensis Urban, 2005 -- valid
  Anthrenoides paulensis Urban, 2008 -- valid
  Anthrenoides petrolinensis Urban, 2006 -- valid
  Anthrenoides petuniae Urban, 2005 -- valid
  Anthrenoides pinhalensis Urban, 2005 -- valid
  Anthrenoides politus Urban, 2005 -- valid
  Anthrenoides punctatus Urban, 2009 -- invalid
  Anthrenoides reticulatus Urban, 2005 -- valid
  Anthrenoides rodrigoi Urban, 2005 -- valid
  Anthrenoides saltensis Urban, 2009 -- valid
  Anthrenoides sanpedroi Urban, 2009 -- valid
  Anthrenoides santiagoi Urban, 2005 -- valid
  Anthrenoides serranicola Urban, 2005 -- valid
  Anthrenoides sidiae Urban, 2008 -- valid
  Anthrenoides sulinus Urban, 2008 -- valid
  Anthrenoides tucumanus Urban, 2009 -- valid
  Anthrenoides villaguayensis Urban, 2009 -- valid
  Anthrenoides zanellai Urban, 2005 -- valid
  Aphaenogaster picena Baroni Urbani, 1971 -- valid
  Aphaenogaster spinosa etrusca Baroni Urbani, 1969 -- valid
  Atrioplanaria delamarei Gourbault, 1969 -- invalid
  Atrioplanaria morisii Benazzi and Gourbault, 1977 -- invalid
  Austrostelis amapaensis Urban, 2006 -- valid
  Austrostelis maranhensis Urban, 2003 -- valid
  Austrostelis santaterezae Urban, 2006 -- valid
  Austrostelis silveirai Urban, 2006 -- valid
  Balliania Gourbault, 1978 -- valid
  Balliania thetisae Gourbault, 1978 -- valid
  Ballianiidae Gourbault, 1978 -- invalid
  Belminus laportei Lent, Jurberg and Carcavallo, 1995 -- valid
  Bos sauveli Urbain, 1937 -- valid -- kouprey, Kouprey
  Calyptomyrmex singalensis Baroni Urbani, 1975 -- valid
  Calyptomyrmex tamil Baroni Urbani, 1975 -- valid
  Calyptomyrmex vedda Baroni Urbani, 1975 -- valid
  Calyptomyrmex wittmeri Baroni Urbani, 1975 -- valid
  Camponotus barbosus Baroni Urbani, 1972 -- valid
  Camponotus kutterianus Baroni Urbani, 1972 -- valid
  Candoiidae Pyron, Reynolds and Burbrink, 2014 -- valid
  Cataglyphis lunaticus Baroni Urbani, 1969 -- valid
  Ceblurgus Urban & Moure, 1993 -- valid
  Ceblurgus longipalpis Urban & Moure, 1993 -- valid
  Cephalotes bloosi Baroni Urbani, 1999 -- valid
  Cephalotes dieteri Baroni Urbani, 1999 -- valid
  Cephalotes poinari Baroni Urbani, 1999 -- valid
  Chalepogenus luciane (Urban, 1996) -- valid
  Colletes desantisi Moure & Urban, 2002 -- invalid
  Ctenanthidium nigripes Urban, 1993 -- invalid
  Dendrocoelides codreanui (Gourbault, 1967) -- invalid
  Dendrocoelides dumitrescuae (Gourbault, 1967) -- invalid
  Dendrocoelides lescherae (Gourbault, 1970) -- invalid
  Dendrocoelides orghidani (Gourbault, 1967) -- invalid
  Dendrocoelides tuzetae (Gourbault, 1965) -- invalid
  Dendrocoelopsis beauchampi (Gourbault, 1969) -- valid
  Dendrocoelopsis bessoni Gourbault, Benazzi and Hellouet, 1976 -- valid
  Dendrocoelum codreanui Gourbault, 1967 -- valid
  Dendrocoelum dumitrescuae Gourbault, 1967 -- valid
  Dendrocoelum lescherae Gourbault, 1970 -- valid
  Dendrocoelum orghidani Gourbault, 1967 -- invalid
  Dendrocoelum tuzetae Gourbault, 1965 -- valid
  Diaphus hudsoni Zurbrigg and Scott, 1976 -- valid
  Dicranthidium insulare Urban, 1993 -- invalid
  Discothyrea stumperi Baroni Urbani, 1977 -- valid
  Duckeanthidium amazonense (Urban, 1995) -- valid
  Duckeanthidium cibele Urban, 1995 -- valid
  Duckeanthidium paraense (Urban, 1995) -- valid
  Duckeanthidium rondonicola (Urban, 1995) -- valid
  Duckeanthidium tarapotoense Urban, 2004 -- valid
  Duckeanthidium yurimaguasano (Urban, 2004) -- valid
  Duckeanthidium zanolae (Urban, 1999) -- invalid
  Dugesia iberica Gourbault and Benazzi, 1979 -- invalid
  Dugesia jenkinsae Benazzi and Gourbault, 1977 -- invalid
  Dugesia miltgeni Gourbault, 1980 -- invalid
  Dugesia tahitiensis Gourbault, 1977 -- invalid
  Elaphe slowinskii Burbrink, 2002 -- invalid -- Slowinski's Cornsnake
  Elaphe zoigeensis Huang, Ding, Burbrink, Yang, Huang, Ling, Chen and Zhang, 2012 -- valid -- Zoige Ratsnake
  Ellopia annisaria Walker in D'Urban, 1860 -- invalid
  Emeryopone franzi (Baroni Urbani, 1975) -- valid
  Emeryopone loebli (Baroni Urbani, 1975) -- valid
  Epanthidium araranguense Urban, 2006 -- valid
  Epanthidium aureocinctum Urban, 1992 -- valid
  Epanthidium bolivianum Urban, 1992 -- valid
  Epanthidium chapadense Urban, 2006 -- valid
  Epanthidium desantisi Urban, 1992 -- valid
  Epanthidium dilmae (Urban, 1991) -- valid
  Epanthidium flavoclypeatum Urban, 2006 -- valid
  Epanthidium maculatum Urban, 1992 -- valid
  Epanthidium trichura (Moure & Urban, 1991) -- valid
  Epanthidium trilobatus Urban, 1992 -- valid
  Epanthidium tuberculatum Urban, 1992 -- valid
  Euchlaena effecta (Walker in D'Urban, 1860) -- valid
  Euphysa peregrina (Murbach, 1899) -- valid
  Florilegus affinis Urban, 1970 -- valid
  Florilegus flavohirtus Urban, 1970 -- valid
  Florilegus similis Urban, 1970 -- valid
  Gaesischia anthidioides Urban, 1968 -- valid
  Gaesischia araguaiana Urban, 1968 -- valid
  Gaesischia aurea Urban, 1968 -- valid
  Gaesischia buzzii Urban, 1989 -- valid
  Gaesischia cacerensis Urban, 1989 -- valid
  Gaesischia caracicola Urban, 2007 -- valid
  Gaesischia carinata Urban, 1989 -- valid
  Gaesischia cipoana Urban, 2007 -- valid
  Gaesischia fimbriata Urban, 1968 -- valid
  Gaesischia glabrata Urban, 1989 -- valid
  Gaesischia horizontina Urban, 2007 -- valid
  Gaesischia interrupta Urban, 1989 -- valid
  Gaesischia melanaspis Urban, 1968 -- valid
  Gaesischia minima Urban, 1989 -- valid
  Gaesischia mirnae Urban, 1989 -- valid
  Gaesischia pygmaea Urban, 1968 -- valid
  Gaesischia rosadoi Urban, 1989 -- valid
  Gaesischia similis Urban, 1989 -- valid
  Gaesischia trifasciata Urban, 1968 -- valid
  Gaesischia undulata Urban, 1989 -- valid
  Geocentrophora boui de Beauchamp and Gourbault, 1967 -- valid
  Girardia jenkinsae (Benazzi and Gourbault, 1977) -- valid
  Girardia miltgeni (Gourbault, 1980) -- invalid
  Girardia tahitiensis (Gourbault, 1977) -- valid
  Gnamptogenys levinates Baroni Urbani, 1980 -- valid
  Gnamptogenys pristina Baroni Urbani, 1980 -- valid
  Gueneria similaria (Walker in D'Urban, 1860) -- valid
  Habromys delicatulus Carleton, Sánchez and Urbano Vidales, 2002 -- valid -- Delicate Deermouse
  Hamatothrix Urban, 1989 -- valid
  Hamatothrix silvai Urban, 1989 -- valid
  Hemigrammus analis Durbin, 1909 -- valid
  Hemigrammus coeruleus Durbin in Eigenmann, 1908 -- valid
  Hemigrammus cupreus Durbin in Eigenmann, 1918 -- valid
  Hemigrammus cylindricus Durbin, 1909 -- valid
  Hemigrammus erthrozonus Durbin, 1909 -- invalid
  Hemigrammus erythrozonus Durbin, 1909 -- valid -- glowlight tetra, glowlight tetra
  Hemigrammus hyanuary Durbin in Eigenmann, 1918 -- valid
  Hemigrammus iota Durbin, 1909 -- valid
  Hemigrammus levis Durbin in Eigenmann, 1908 -- valid
  Hemigrammus lunatus Durbin in Eigenmann, 1918 -- valid
  Hemigrammus microstomus Durbin in Eigenmann, 1918 -- valid
  Hemigrammus orthus Durbin, 1909 -- valid
  Hemigrammus rodwayi Durbin, 1909 -- valid -- golden tetra, golden tetra, Rodway's tetra
  Hemigrammus stictus (Durbin, 1909) -- valid
  Heriades otavica Eardley & R. P. Urban, 2006 -- valid
  Heriades otavicus Eardley & R. P. Urban, 2006 -- invalid
  Hermanlentia Jurberg and Galvão, 1997 -- valid
  Homochlodes lactispargaria (Walker in D'Urban, 1861) -- valid
  Hoplostelis amapaensis (Urban, 2006) -- invalid
  Hoplostelis gabrieli Urban, 2001 -- valid
  Hoplostelis santaterezae (Urban, 2006) -- invalid
  Hoplostelis silveirai (Urban, 2006) -- invalid
  Hylaeus seabrai Urban & Moure, 2002 -- valid
  Hypanthidiodes insulare (Urban, 1993) -- invalid
  Hypanthidioides aliceae (Urban, 2002) -- valid
  Hypanthidioides argentina (Urban, 1993) -- valid
  Hypanthidioides bahiana (Urban, 1995) -- valid
  Hypanthidioides bifasciata (Urban, 1993) -- valid
  Hypanthidioides bilobata (Urban, 1997) -- valid
  Hypanthidioides capixaba (Urban, 1995) -- valid
  Hypanthidioides castanea (Urban, 1997) -- valid
  Hypanthidioides catarinensis (Urban, 1995) -- valid
  Hypanthidioides cavichiolii (Urban, 1993) -- valid
  Hypanthidioides chapadicola (Urban, 1998) -- valid
  Hypanthidioides christinae (Urban, 1993) -- valid
  Hypanthidioides clausi (Urban, 2003) -- valid
  Hypanthidioides diversa (Urban, 1997) -- valid
  Hypanthidioides emarginata (Urban, 1997) -- valid
  Hypanthidioides fasciata (Urban, 1997) -- valid
  Hypanthidioides ferrugineum (Urban, 1994) -- valid
  Hypanthidioides gracilis (Urban, 1993) -- valid
  Hypanthidioides insularis (Urban, 1993) -- valid
  Hypanthidioides insularis (Urban, 1998) -- valid
  Hypanthidioides lamasi (Urban, 2003) -- valid
  Hypanthidioides luciae (Urban, 1993) -- valid
  Hypanthidioides maculosa (Urban, 1997) -- valid
  Hypanthidioides marginata (Moure & Urban, 1993) -- valid
  Hypanthidioides mourei (Urban, 1993) -- valid
  Hypanthidioides nigripes (Urban, 1993) -- valid
  Hypanthidioides nigripes (Urban, 1996) -- valid
  Hypanthidioides nigritula (Urban, 1997) -- valid
  Hypanthidioides ornata (Urban, 2003) -- valid
  Hypanthidioides ornata (Urban, 1997) -- valid
  Hypanthidioides paranaensis (Urban, 1995) -- valid
  Hypanthidioides polita (Urban, 1997) -- valid
  Hypanthidioides pontagrossensis (Urban, 2003) -- valid
  Hypanthidioides rubripes (Urban, 1996) -- valid
  Hypanthidioides sakagamii (Urban, 1994) -- valid
  Hypanthidioides seabrai (Urban, 2002) -- valid
  Hypanthidioides soniae (Urban, 1992) -- valid
  Hypanthidioides spinosa (Urban, 1997) -- valid
  Hypanthidioides zanolae (Urban, 1993) -- valid
  Hypanthidium cacerense Urban, 1997 -- valid
  Hypanthidium dressleri Urban, 1997 -- valid
  Hypanthidium duckei Urban, 1997 -- valid
  Hypanthidium erythrogaster Moure & Urban, 1993 -- invalid
  Hypanthidium magdalenae Urban, 1997 -- valid
  Hypanthidium maranhense Urban, 1997 -- valid
  Hypanthidium nigritulum Urban, 1997 -- valid
  Hypanthidium tuberigaster (Urban, 1994) -- valid
  Hyphessobrycon Durbin in Eigenmann, 1908 -- valid
  Hyphessobrycon bentosi Durbin in Eigenmann, 1908 -- valid
  Hyphessobrycon bentosi bentosi Durbin in Eigenmann, 1908 -- invalid -- bentos tetra, bentos tetra
  Hyphessobrycon bentosi rosaceus Durbin, 1909 -- invalid -- rosy tetra, rosy tetra
  Hyphessobrycon catableptus (Durbin, 1909) -- valid
  Hyphessobrycon copelandi Durbin in Eigenmann, 1908 -- valid -- Copeland's tetra
  Hyphessobrycon eos Durbin, 1909 -- valid
  Hyphessobrycon melazonatus Durbin in Eigenmann, 1908 -- valid
  Hyphessobrycon milleri Durbin in Eigenmann, 1908 -- valid
  Hyphessobrycon minimus Durbin, 1909 -- valid -- dwarf tetra, dwarf tetra
  Hyphessobrycon minor Durbin, 1909 -- valid
  Hyphessobrycon panamensis Durbin in Eigenmann, 1908 -- valid
  Hyphessobrycon rosaceus Durbin, 1909 -- valid
  Hyphessobrycon serpae Durbin in Eigemann, 1908 -- invalid -- serpae tetra, serpae tetra
  Hyphessobrycon stramineus Durbin in Eigenmann, 1918 -- valid
  Hypolytus Murbach, 1899 -- invalid
  Hypolytus peregrinus Murbach, 1899 -- invalid
  Hypsibius convergens (Urbanowicz, 1925) -- valid
  Hypsilurus schultzewestrumi (Urban, 1999) -- valid
  Ketianthidium Urban, 1999 -- valid
  Ketianthidium zanolae Urban, 1999 -- valid
  Lanthanomelissa betinae Urban, 1996 -- valid
  Lanthanomelissa clementis Urban, 1996 -- valid
  Lanthanomelissa magaliae Urban, 1996 -- valid
  Lanthanomelissa pampicola Urban, 1996 -- valid
  Larocanthidium ornatum Urban, 1997 -- invalid
  Leioaspetos archeyi (Turbott, 1942) -- invalid
  Leiopelma archeyi Turbott, 1942 -- valid
  Leioproctus crassipunctatus (Urban, 1995) -- valid
  Leioproctus fulvus (Moure & Urban, 1995) -- valid
  Leioproctus guaritarus (Urban, 1995) -- valid
  Leioproctus isabelae (Urban, 1995) -- valid
  Leioproctus minor (Moure & Urban, 1995) -- valid
  Leioproctus pallidus (Moure & Urban, 1995) -- valid
  Leioproctus pampeanus (Urban, 1995) -- valid
  Leioproctus rugatus (Urban, 1995) -- valid
  Lepisiota frauenfeldi velox (Baroni Urbani, 1968) -- valid
  Leptanilla africana Baroni Urbani, 1977 -- valid
  Leptanilla australis Baroni Urbani, 1977 -- valid
  Leptanilla besucheti Baroni Urbani, 1977 -- valid
  Leptanilla boltoni Baroni Urbani, 1977 -- valid
  Leptanilla buddhista Baroni Urbani, 1977 -- valid
  Leptanilla islamica Baroni Urbani, 1977 -- valid
  Leptanilla japonica Baroni Urbani, 1977 -- valid
  Leptanilla kubotai Baroni Urbani, 1977 -- valid
  Leptanilla oceanica Baroni Urbani, 1977 -- valid
  Leptanilla tanakai Baroni Urbani, 1977 -- valid
  Leptanilla thai Baroni Urbani, 1977 -- valid
  Leptomyrmex neotropicus Baroni Urbani, 1980 -- valid
  Leptothorax alayoi Baroni Urbani, 1978 -- valid
  Leptothorax anemicus Baroni Urbani, 1978 -- valid
  Leptothorax annexus Baroni Urbani, 1978 -- valid
  Leptothorax augusti Baroni Urbani, 1978 -- valid
  Leptothorax creolus Baroni Urbani, 1978 -- valid
  Leptothorax gibbifer Baroni Urbani, 1978 -- valid
  Leptothorax goniops Baroni Urbani, 1978 -- valid
  Leptothorax hispaniolae Baroni Urbani, 1978 -- valid
  Leptothorax huehuetenangoi Baroni Urbani, 1978 -- valid
  Leptothorax ixili Baroni Urbani, 1978 -- valid
  Leptothorax laestrygon splendidiceps Baroni Urbani, 1968 -- valid
  Leptothorax lagrecai Baroni Urbani, 1964 -- valid
  Leptothorax leucacanthus Baroni Urbani, 1978 -- valid
  Leptothorax nigricans Baroni Urbani, 1978 -- valid
  Leptothorax ocarinae Baroni Urbani, 1978 -- valid
  Leptothorax pastoris Baroni Urbani, 1978 -- valid
  Leptothorax senectutis Baroni Urbani, 1978 -- valid
  Leptothorax smithi Baroni Urbani, 1978 -- valid
  Leptothorax tenuisculptus Baroni Urbani, 1978 -- valid
  Leptothorax totonicapani Baroni Urbani, 1978 -- valid
  Leucandra apicalis Urban, 1905 -- valid
  Leucandra heathi Urban, 1905 -- valid
  Leucilla nuttingi (Urban, 1902) -- valid
  Leuckartiara breviconis (Murbach and Shearer, 1902) -- valid
  Leucosolenia eleanor Urban, 1905 -- valid
  Linshcosteini Carcavallo, Jurberg, Lent Noireau and Galvão, 2000 -- invalid
  Linshcosteus karupus Galvão, Patterson, Rocha and Jurberg in Galvão et al., 2002 -- valid
  Liolaemus pictus talcanensis Urbina and Zungia, 1977 -- valid
  Lophothygater aculeata Urban, 1999 -- valid
  Lophothygater nigrita Urban, 1999 -- valid
  Lycia ursaria (Walker in D'Urban, 1860) -- valid -- Stout Spanworm
  Macrobiotus convergens Urbanowicz, 1925 -- invalid
  Madagascarophis lolo Ruane, Burbrink, Randriamahatantsoa and Raxworthy, 2016 -- valid
  Mayriella transfuga Baroni Urbani, 1977 -- valid
  Megachile manyara Eardley & R. P. Urban, 2006 -- valid
  Megachile mimeticana Eardley & R. P. Urban, 2006 -- valid
  Megachile mixtura Eardley & R. P. Urban, 2005 -- valid
  Megalogonia Surber, 1928 -- valid
  Melissoptila albinoi Urban, 1998 -- valid
  Melissoptila aliceae Urban, 1998 -- valid
  Melissoptila amazonica Urban, 1998 -- valid
  Melissoptila aurea Urban, 1998 -- valid
  Melissoptila aureocincta Urban, 1968 -- valid
  Melissoptila bahiana Urban, 1998 -- valid
  Melissoptila boliviana Urban, 1998 -- valid
  Melissoptila buzzii Urban, 1998 -- valid
  Melissoptila cacerensis Urban, 1998 -- valid
  Melissoptila carinata Urban, 1998 -- valid
  Melissoptila catamarcensis Urban, 1998 -- valid
  Melissoptila chilena Urban, 1998 -- valid
  Melissoptila claudii Urban, 1988 -- valid
  Melissoptila clypeata Urban, 1998 -- valid
  Melissoptila ecuatoriana Urban, 1998 -- valid
  Melissoptila fulvonigra Urban, 1988 -- valid
  Melissoptila grafi Urban, 1998 -- valid
  Melissoptila hirsutula Urban, 1998 -- valid
  Melissoptila larocai Urban, 1998 -- valid
  Melissoptila marinonii Urban, 1998 -- valid
  Melissoptila mielkei Urban, 1998 -- valid
  Melissoptila mirnae Urban, 1998 -- valid
  Melissoptila montanicola Urban, 1998 -- valid
  Melissoptila moureana Urban, 1998 -- valid
  Melissoptila ornata Urban, 1998 -- valid
  Melissoptila paranaensis Urban, 1998 -- valid
  Melissoptila plumata Urban, 1998 -- valid
  Melissoptila renatoi Urban, 1998 -- valid
  Melissoptila sertanicola Urban, 1998 -- valid
  Melissoptila setigera Urban, 1998 -- valid
  Melissoptila sexcincta Urban, 1998 -- valid
  Melissoptila similis Urban, 1988 -- valid
  Melissoptila solangeae Urban, 1998 -- valid
  Melissoptila trifasciata Urban, 1998 -- valid
  Melissoptila villosa Urban, 1998 -- valid
  Mesonema victoria Murbach and Shearer, 1902 -- invalid
  Mielkeanthidium nigripes Urban, 1996 -- invalid
  Mielkeanthidium ornatum Urban, 2003 -- invalid
  Mirnapis Urban, 1998 -- valid
  Mirnapis inca Urban, 1998 -- valid
  Mydrosomella cleia Graf & Urban, 2001 -- valid
  Nananthidium fasciatum Urban, 2007 -- invalid
  Nananthidium flavoalveolatum Urban, 2007 -- invalid
  Nananthidium peruvianum Urban, 2007 -- invalid
  Nananthidium schlindweini Urban, 2007 -- invalid
  Nematopus schaffneri Brailovsky and Zurbia, 1983 -- valid
  Neoturris breviconis (Murbach and Shearer, 1902) -- valid
  Notanthidium adornatum (Urban, 1997) -- valid
  Notanthidium andicola (Urban, 2001) -- valid
  Notanthidium chilense (Urban, 2003) -- invalid
  Notanthidium nigritum (Urban, 1997) -- valid
  Oligomyrmex diabolicus Baroni Urbani, 1969 -- valid
  Oxaea alvarengai Moure and Urban, 1963 -- valid
  Oxaea sooretama Graf and Urban, 2008 -- valid
  Pachysvastra flavofasciata Urban, 1999 -- valid
  Panstrongylus sherlocki Jurberg, Carcavallo and Lent, 2001 -- valid
  Pantherophis slowinskii (Burbrink, 2002) -- valid -- Slowinski's Cornsnake
  Paraplanaria Ball and Gourbault, 1978 -- valid
  Paraponera dieteri Baroni Urbani, 1994 -- valid
  Petrophora subaequaria (Walker in D'Urban, 1860) -- valid -- Northern Petrophora
  Phagocata delamarei (Gourbault, 1969) -- valid
  Phagocata fawcetti Ball and Gourbault, 1975 -- valid
  Plagnolia de Beauchamp and Gourbault, 1964 -- valid
  Plagnolia vandeli de Beauchamp and Gourbault, 1964 -- valid
  Pristimantis quicato Ospina-Sarria, Méndez-Narváez, Burbano-Yandi and Bolívar-García, 2011 -- valid
  Promyrmicium Baroni Urbani, 1971 -- valid
  Psaenythisca punctata (Urban, 2009) -- valid
  Psammolestes tertius Lent and Jurberg, 1966 -- invalid
  Pyramica schleeorum (Baroni Urbani, 1994) -- valid
  Rhabdodermella nuttingi Urban, 1902 -- invalid
  Rhodnius colombiensis Mejia, Galvão and Jurberg, 1999 -- valid
  Rhodnius milesi Carcavallo, Rocha, Galvão and Jurberg in Valente et al., 2001 -- valid
  Rhodnius stali Lent, Jurberg and Galvão, 1993 -- valid
  Rhodnius tertius (Lent and Jurberg, 1966) -- valid
  Rhyacophila schmidinarica Urbanic, Krusnik, & Malicky, 2000 -- valid
  Santiago Urban, 1989 -- valid
  Santiago mourei Urban, 1989 -- valid
  Santiago wittmanni Urban, 2003 -- valid
  Saranthidium insulare Urban, 1998 -- invalid
  Sarsia apicula (Murbach and Shearer, 1902) -- valid
  Sceloporus clarkii vallaris Shannon and Urbano, 1954 -- valid -- Plateau Spiny Lizard
  Scopula junctaria (Walker in D'Urban, 1861) -- valid -- Simple Wave
  Scypha coacta (Urban, 1905) -- valid
  Sphecodes punctiscutum Eardley & R. P. Urban, 2006 -- valid
  Spilogale pygmaea intermedia López-Forment and Urbano, 1979 -- valid
  Stenamma bhutanense Baroni Urbani, 1977 -- valid
  Stenamma kashmirense Baroni Urbani, 1977 -- valid
  Strongylognathus dalmaticus Baroni Urbani, 1969 -- valid
  Strongylognathus insularis Baroni Urbani, 1968 -- valid
  Svastra maculata Urban, 1998 -- valid
  Svastrides neffi Urban, 1975 -- valid
  Sycon coacta Urban, 1905 -- invalid
  Thamnophis bogerti Rossman and Burbrink, 2005 -- valid
  Thamnophis conanti Rossman and Burbrink, 2005 -- valid
  Thamnophis lineri Rossman and Burbrink, 2005 -- valid
  Thygater anae Urban, 1999 -- valid
  Thygater armandoi Urban, 1999 -- valid
  Thygater colombiana Urban, 1967 -- valid
  Thygater crawfordi Urban, 1967 -- valid
  Thygater hirtiventris Urban, 1967 -- valid
  Thygater laevis Urban, 1999 -- valid
  Thygater latitarsis Urban, 1967 -- valid
  Thygater melanotricha Urban, 1967 -- valid
  Thygater mexicana Urban, 1967 -- valid
  Thygater micheneri Urban, 1967 -- valid
  Thygater minarum Urban, 1999 -- valid
  Thygater mourei Urban, 1961 -- valid
  Thygater nigrilabris Urban, 1967 -- valid
  Thygater nigropilosa Urban, 1967 -- valid
  Thygater paranaensis Urban, 1967 -- valid
  Thygater seabrai Urban, 1967 -- valid
  Thygater tuberculata Urban, 1967 -- valid
  Thygater ubirajarai Urban, 1999 -- valid
  Thygater xanthopyga Urban, 1967 -- valid
  Torrealbaia Carcavallo, Jurberg and Lent, 1998 -- invalid
  Torrealbaia martinezi Carcavallo, Jurberg and Lent, 1998 -- invalid
  Trachymyrmex primaevus Baroni Urbani, 1980 -- valid
  Triatoma baratai Carcavallo and Jurberg, 2000 -- valid
  Triatoma carcavalloi Jurberg, Rocha and Lent, 1998 -- valid
  Triatoma gomeznunezi Martínez, Carcavallo and Jurberg, 1994 -- valid
  Triatoma klugi Carcavallo, Jurberg, Lent and Galvão, 2001 -- valid
  Triatoma pintodiasi Jurberg, Cunha and Rocha in Jurberg et al., 2013 -- valid
  Triatoma sherlocki Papa, Jurberg, Carcavallo, Cerqueira and Barata, 2002 -- valid
  Triatoma vandae Carcavallo, Jurberg, Rocha, Galvão, Noireau and Lent, 2002 -- valid
  Trichocerapis pernambucana Urban, 1989 -- valid
  Trichocerapis peruana Urban, 1989 -- valid
  Turris breviconis Murbach and Shearer, 1902 -- invalid
  Tydides quatuor Lent and Jurberg, 1967 -- valid
  Unio carcasinus Sourbieu, 1887 -- invalid
 
 Kingdom Plantae
  Abutilon trisulcatum (Jacq.) Urb. -- accepted -- anglestem Indian mallow
  Acalypha mogotensis Urb. -- accepted
  Achnatherum coronatum (Thurb.) Barkworth -- accepted -- giant ricegrass
  Achnatherum occidentale (Thurb. ex S. Watson) Barkworth -- accepted -- western needlegrass
  Achnatherum occidentale ssp. occidentale (Thurb. ex S. Watson) Barkworth -- accepted -- western needle grass, western needlegrass
  Achnatherum webberi (Thurb.) Barkworth -- accepted -- Webber needlegrass, Webber's needlegrass
  Adenocalymma obovatum Urb. -- not accepted
  Adenorima gymnonota (Urb.) Millsp. -- not accepted
  Adipera stahlii (Urb.) Britton & Rose ex Britton & P. Wilson -- not accepted
  Aegiphila martinicensis var. oligoneura (Urb.) Moldenke -- not accepted
  Aeschynomene portoricensis Urb. -- accepted
  Ageratina resiniflua (Urb.) King & H. Rob. -- accepted -- resinous snakeroot
  Agrimonia polyphylla Urb. -- not accepted
  Agrostis exigua Thurb. -- not accepted
  Agrostis hillebrandii Thurb. ex Bol. -- not accepted
  Aira caespitosa var. arctica (Spreng.) Thurb. ex A. Gray -- not accepted
  Alchorneopsis portoricensis Urb. -- not accepted -- Puerto Rico palo de gallina
  Alcmene Urb. -- not accepted
  Alcmene tobagensis Urb. -- not accepted
  Alloplectus ambiguus Urb. -- not accepted
  Alloplectus ambiguus var. chlorosepalus Urb. -- not accepted
  Alloplectus ambiguus var. erythrosepalus Urb. -- not accepted
  Alloplectus cubensis (Urb.) Stearn -- not accepted
  Alloplectus domingensis Urb. -- not accepted
  Alloplectus grisebachianus (Kuntze) Urb. -- not accepted
  Alloplectus grisebachianus var. ochrotrichus Urb. -- not accepted
  Alsine antillana (Urb.) Britton & P. Wilson -- not accepted
  Alternanthera dolichocephala Urb. -- not accepted
  Alternanthera flavogrisea Urb. -- not accepted -- hairy joyweed
  Alternanthera olivacea (Urb.) Urb. -- accepted
  Alternanthera peploides (Humb. & Bonpl. ex Schult.) Urb. -- not accepted
  Alternanthera tenella ssp. flavogrisea (Urb.) Mears & Veldkamp -- not accepted
  Alvaradoa amorphoides ssp. psilophylla (Urb.) Cronquist -- accepted -- Mexican alvaradoa
  Alvaradoa amorphoides ssp. psilophyllis (Urb.) Cronquist -- not accepted
  Alvaradoa psilophylla Urb. -- not accepted
  Amomis caryophyllata (Jacq.) Krug & Urb. -- not accepted
  Andira jamaicensis (W. Wright) Urb. -- not accepted
  Andropogon myosurus var. feensis (E. Fourn.) Urbina -- not accepted
  Andropogon zizanioides (L.) Urb. -- not accepted
  Anechites nerium (Aubl.) Urb. -- accepted -- Natal plum
  Anemopaegma tobagense Urb. -- not accepted
  Antirhea acutata (DC.) Urb. -- not accepted -- placa chiquitu
  Antirhea coriacea (Vahl) Urb. -- not accepted -- pegwood
  Antirhea obtusifolia Urb. -- not accepted -- quina roja
  Antirhea sintenisii Urb. -- not accepted -- Sintenis' quina
  Ardisia glauciflora Urb. -- accepted -- ausubon
  Argythammia stahlii Urb. -- not accepted
  Argythamnia stahlii Urb. -- accepted -- bluntleaf silverbush
  Aristida californica Thurb. -- accepted -- California threeawn, Mojave threeawn
  Aristida californica var. californica Thurb. -- accepted -- California threeawn
  Aristida correlliae P.M. McKenzie, Urbatsch & Proctor -- accepted
  Aristida fasciculata var. nuttallii Thurb. ex Beal -- not accepted
  Arundinaria mirabile (hort. ex Burb.) Hack. -- not accepted
  Arundinaria palmata (hort. ex Burb.) Bean -- not accepted
  Atropis californica Munro ex Thurb. -- not accepted
  Atropis pauciflora Thurb. -- not accepted
  Atropis procumbens (Curtis) Thurb. -- not accepted
  Atropis scabrella Thurb. -- not accepted
  Atropis tenuifolia Thurb. -- not accepted
  Auerodendron Urb. -- accepted
  Baccharis cotinifolia (Willd.) Urb. -- not accepted
  Bambusa palmata hort. ex Burb. -- not accepted
  Banara portoricensis Krug & Urb. -- accepted -- Puerto Rico palo de ramon
  Banara vanderbiltii Urb. -- accepted -- Palo de Ramón, Vanderbilt's palo de ramon
  Besleria coriacea Urb. -- not accepted
  Besleria elongata Urb. -- accepted
  Besleria filipes Urb. -- accepted
  Besleria lanceolata Urb. -- accepted
  Besleria lanceolata var. coriacea (Urb.) Stehlé -- not accepted
  Besleria longipes Urb. -- accepted
  Besleria lutea var. alpestris Urb. -- not accepted
  Besleria lutea var. brevipes Urb. -- not accepted
  Besleria lutea var. imrayi (Hook. f.) Urb. -- not accepted
  Besleria lutea var. intermedia Urb. -- not accepted
  Besleria lutea var. leucantha Urb. -- not accepted
  Besleria lutea var. vincentina Urb. -- not accepted
  Besleria lutea var. vulgaris Urb. -- not accepted
  Besleria petiolaris (Griseb.) Urb. -- accepted
  Besleria seitzii Krug & Urb. -- accepted
  Besleria sieberiana Urb. -- accepted
  Besleria strigillosa Urb. -- accepted
  Blechum pyramidatum (Lam.) Urb. -- not accepted -- Browne's blechum
  Bonellia stenophylla (Urb.) B. Ståhl & Källersjö -- accepted
  Borreria brachysepala Urb. -- not accepted
  Borreria laevis var. sintenisii Urb. -- not accepted
  Bouteloua trifida Thurb. -- accepted -- red grama
  Bouteloua trifida var. trifida Thurb. -- accepted -- red grama
  Bromelica (Thurb.) Farw. -- not accepted
  Bromelica aristata (Thurb. ex Bol.) Farw. -- not accepted
  Bromus breviaristatus (Hook.) Thurb. ex Torr. -- not accepted
  Bromus carinatus var. hookerianus (Thurb.) Shear -- accepted
  Bromus hookerianus Thurb. -- not accepted
  Brunfelsia densifolia Krug & Urb. -- accepted -- Serpentine Hill raintree
  Brunfelsia lactea Krug & Urb. -- accepted -- vega blanca
  Brunfelsia portoricensis Krug & Urb. -- accepted -- Puerto Rico raintree
  Bumelia bellonis (Urb.) Stearn -- not accepted
  Caesalpinia ciliata (Bergius ex Wikstr.) Urb. -- not accepted -- mato
  Caesalpinia divergens Urb. -- not accepted -- small yellow nicker
  Caesalpinia melanosperma (Eggers) Urb. -- not accepted -- mato
  Calamagrostis bolanderi Thurb. -- accepted -- Bolander's reedgrass
  Calamagrostis breweri Thurb. -- accepted -- shorthair reedgrass
  Calamagrostis crassiglumis Thurb. -- not accepted
  Calamagrostis neglecta var. crassiglumis (Thurb.) Beal -- not accepted
  Calamagrostis sylvatica var. purpurascens Thurb. ex Vasey -- not accepted
  Calamagrostis varia Bol. ex Thurb. -- not accepted
  Calopogonium orthocarpum Urb. -- not accepted
  Calyptranthes kiaerskovii Krug & Urb. -- accepted -- Kiaerskov's lidflower
  Cananga caribaea (Urb.) Britton -- not accepted
  Canavalia rusiosperma Urb. -- not accepted
  Canna jaegeriana Urb. -- accepted -- Caribbean canna
  Canna pertusa Urb. -- accepted -- maraca montuna
  Capparis portoricensis Urb. -- not accepted
  Caralluma russelliana (Courbon ex Brongn.) Cufod. -- not accepted
  Casasia clusiifolia (Jacq.) Urb. -- accepted -- sevenyear apple
  Casearia arborea (Rich.) Urb. -- accepted -- gia verde
  Casearia bicolor Urb. -- not accepted
  Casearia guianensis (Aubl.) Urb. -- accepted -- Guyanese wild coffee
  Cassia ekmaniana Urb. -- not accepted
  Cassia exunguis Urb. -- not accepted -- tamarindillo
  Cassia granulata (Urb.) J.F. Macbr. -- not accepted
  Cassia mirabilis (Pollard) Urb. -- not accepted
  Cassia portoricensis Urb. -- not accepted
  Cassia stahlii Urb. -- not accepted
  Cassine xylocarpa var. caribaea Urb. -- not accepted
  Catesbaea melanocarpa Krug & Urb. -- accepted -- tropical lilythorn
  Centella asiatica (L.) Urb. -- accepted -- spadeleaf
  Cerastium brachypetalum ssp. tauricum (Spreng.) Murb. -- not accepted -- gray chickweed
  Ceratochloa carinata var. hookerianus (Thurb.) Tzvelev -- not accepted
  Ceratophytum tobagense (Urb.) Sprague & Sandwith -- accepted
  Ceratostema portoricensis (Urb.) Hoerold -- not accepted
  Cereus portoricensis (Britton) Urb. -- not accepted
  Chamaecrista exunguis (Urb.) Britton -- not accepted
  Chamaecrista granulata (Urb.) Britton -- not accepted
  Chamaecrista portoricensis (Urb.) O.F. Cook & G.N. Collins -- accepted -- Puerto Rico sensitive pea
  Chamaesyce adenoptera ssp. gundlachii (Urb.) D.G. Burch -- not accepted
  Chamaesyce albescens (Urb.) Millsp. -- not accepted
  Chamaesyce biramensis (Urb.) Alain -- not accepted
  Chamaesyce crassinodis (Urb.) Millsp. -- not accepted
  Chamaesyce dorsiventralis (Urb.) Millsp. -- not accepted
  Chamaesyce filicaulis (Urb.) Alain -- not accepted
  Chamaesyce gundlachii (Urb.) Alain -- not accepted
  Chamaesyce gymnadenia (Urb.) Millsp. -- not accepted
  Chamaesyce helwigii (Urb. & Ekman) D.G. Burch -- not accepted
  Chamaesyce hepatica (Urb. & Ekman) D.G. Burch -- not accepted
  Chamaesyce liliputiana (C. Wright ex Urb.) Millsp. -- not accepted
  Chamaesyce mangletii (Urb.) Alain -- not accepted
  Chamaesyce microclada (Urb.) Alain -- not accepted
  Chamaesyce multinodis (Urb.) Millsp. -- not accepted
  Chamaesyce niqueroana (Urb.) Alain -- not accepted
  Chamaesyce pachypoda (Urb.) Alain -- not accepted
  Chamaesyce parciflora (Urb.) D.G. Burch -- not accepted
  Chamaesyce paucipila (Urb.) Millsp. -- not accepted
  Chamaesyce pinariona (Urb.) Alain -- not accepted
  Chamaesyce portoricensis (Urb.) Millsp. -- not accepted
  Chamaesyce torralbasii (Urb.) Millsp. -- not accepted -- Torralbas' sandmat
  Chamaesyce yayalesia (Urb.) Alain -- not accepted
  Chione seminervis Urb. & Ekman -- not accepted -- puntaj jayuya
  Chione venosa (Sw.) Urb. -- accepted -- fatpork
  Chloris gayana f. oligostachys (Barratte & Murb.) Maire & Weiller -- not accepted
  Chloris gayana ssp. oligostachys Barratte & Murb. -- not accepted
  Chloris leptantha Hitchc. ex Urb. -- not accepted
  Chondrosum trifidum (Thurb.) Clayton -- not accepted
  Chromolaena geraniifolia (Urb.) R.M. King & H. Rob. -- accepted -- geraniumleaf thoroughwort
  Chromolaena mononeura (Urb.) R.M. King & H. Rob. -- not accepted
  Chrysothamnus scopulorum (M.E. Jones) Urbatsch, R.P. Roberts & Neubig -- accepted -- Grand Canyon glowweed
  Chrysothamnus stylosus (Eastw.) Urbatsch -- accepted -- pillar false gumweed
  Cleome stenophylla Klotzsch ex Urb. -- accepted -- tropical spiderflower
  Cleyera albopunctata (Griseb.) Krug & Urb. -- accepted -- teta prieta
  Clusia krugiana Urb. -- not accepted
  Cnidoscolus bellator (Ekman ex Urb.) León -- accepted
  Cnidosculus bellator (Ekman ex Urb.) León -- not accepted
  Coccoloba rupicola Urb. -- not accepted
  Coccoloba sintenisii Urb. ex Lindau -- accepted -- uvero de monte
  Coccoloba stintenisii Urb. ex Lindau -- not accepted
  Codonanthe caribaea Urb. -- accepted
  Codonanthe eggersii Urb. -- not accepted
  Colleteria seminervis (Urb. & Ekman) David W. Taylor -- accepted
  Colubrina verrucosa (Urb.) M.C. Johnst. -- accepted -- Urban's nakedwood
  Columnea ambigua (Urb.) B.D. Morley -- accepted -- tibey de cresta
  Columnea brevipila Urb. -- accepted
  Columnea cubensis (Urb.) Britton -- not accepted
  Columnea domingensis (Urb.) B.D. Morley -- accepted
  Columnea fawcettii (Urb.) C.V. Morton -- accepted
  Columnea harrisii (Urb.) Britton ex C.V. Morton -- accepted
  Columnea hirsuta var. concolor Urb. -- not accepted
  Columnea hirsuta var. fawcettii Urb. -- not accepted
  Columnea hirsuta var. pallescens Urb. -- not accepted
  Columnea jamaicensis Urb. -- not accepted
  Columnea sanguinea var. cubensis Urb. -- not accepted
  Columnea scandens var. tulae (Urb.) Wiehler -- accepted -- tibey parasito
  Columnea tulae Urb. -- not accepted -- tibey parasito
  Columnea tulae var. flava Urb. -- not accepted
  Comocladia dodonaea (L.) Urb. -- accepted -- poison ash
  Conostegia hotteana Urb. & Ekman -- not accepted
  Consolea picardae (Urb.) Areces -- not accepted
  Cordia bahamensis Urb. -- not accepted -- Bahama manjack
  Cordia bellonis Urb. -- not accepted -- serpentine manjack
  Cordia borinquensis Urb. -- accepted -- muneco
  Cordia rupicola Urb. -- not accepted -- Puerto Rico manjack
  Cordia tobagensis Urb. -- not accepted
  Cordia tobagensis var. broadwayi Urb. -- not accepted
  Cornutia obovata Urb. -- accepted -- capá jigüerilla, nigua, palo de nigua
  Crantzia ambigua (Urb.) Britton -- not accepted
  Critonia portoricensis (Urb.) Britton & P. Wilson -- accepted -- Puerto Rico thoroughwort
  Croton abeggii Urb. & Ekman -- accepted
  Croton alloeophyllus Urb. -- accepted
  Croton angustatus Urb. -- accepted
  Croton aridicola Urb. -- not accepted
  Croton artibonitensis Urb. -- accepted
  Croton astrophorus Urb. -- accepted
  Croton azuensis Urb. -- accepted
  Croton barahonensis Urb. -- accepted
  Croton belanseanus Urb. & Ekman -- not accepted
  Croton brachytrichus Urb. -- accepted
  Croton buchii Urb. -- accepted
  Croton camagueyanus Urb. -- not accepted
  Croton chaetodus Urb. -- not accepted
  Croton claraensis Urb. -- not accepted
  Croton coronatus Urb. -- accepted
  Croton cristalensis Urb. -- accepted
  Croton curvipes Urb. -- accepted
  Croton dussii Urb. -- accepted
  Croton ekmanii Urb. -- accepted
  Croton excisus Urb. -- accepted
  Croton fuertesii Urb. -- not accepted
  Croton glabellus ssp. polytrichus (Urb.) B.W. van Ee -- accepted
  Croton heterolepis (Urb.) Borhidi & O. Muñiz -- not accepted
  Croton heteropleurus Urb. -- not accepted
  Croton impressus Urb. -- accepted -- Puerto Rico croton
  Croton inaequidens Urb. -- not accepted
  Croton incrustatus Urb. -- not accepted
  Croton jacmelianus Urb. -- accepted
  Croton kenskoflii Urb. -- not accepted
  Croton koehneanus Urb. -- not accepted
  Croton krugianus Urb. -- not accepted
  Croton lindmanii Urb. -- accepted
  Croton linifolius Urb. -- not accepted
  Croton litoralis Urb. -- not accepted
  Croton litoralis var. rugelianus (Urb.) Borhidi & O. Muñiz -- not accepted
  Croton mansfeldii Urb. -- accepted
  Croton megaladenus Urb. -- accepted
  Croton micradenus Urb. -- accepted
  Croton microdon Urb. -- not accepted
  Croton moanus Urb. -- not accepted
  Croton monogynus Urb. -- accepted
  Croton moustiquensis Urb. -- accepted
  Croton nanus Urb. & Ekman -- not accepted
  Croton nephrophyllus Urb. & Ekman -- accepted
  Croton nipensis Urb. -- not accepted
  Croton picardae Urb. -- not accepted
  Croton plumieri Urb. -- not accepted
  Croton poecilanthus Urb. -- accepted -- sabinon
  Croton poitaei Urb. -- accepted
  Croton polytomus Urb. -- accepted
  Croton priorianus Urb. -- accepted
  Croton prostratus Urb. -- accepted
  Croton rectangularis Urb. -- not accepted
  Croton rugelianus (Urb.) Urb. -- not accepted
  Croton sabanensis Urb. -- not accepted
  Croton siguaneanus Urb. & Ekman -- not accepted
  Croton spinosus var. heterolepis Urb. -- not accepted
  Croton subglaber Urb. -- not accepted
  Croton tenuiramis Urb. -- not accepted
  Croton tropidophyllus Urb. -- not accepted
  Croton waltherioides Urb. -- accepted
  Cubanthus umbelliformis Urb. & Ekman -- not accepted
  Cuniculotinus Urbatsch, R.P. Roberts & Neubig -- accepted
  Cuniculotinus gramineus (H.M. Hall) Urbatsch, R.P. Roberts & Neubig -- accepted -- Panamint rock goldenrod
  Cuscuta boldinghii Urb. -- accepted -- Boldingh's dodder
  Cybianthus sintenisii (Urb.) G. Agostini -- accepted -- Puerto Rico ridgerunner
  Cynometra portoricensis Krug & Urb. -- accepted -- oreganillo falso
  Dactyloctenium glaucophyllum Courbai -- not accepted
  Dalbergaria cubensis (Urb.) Borhidi -- not accepted
  Dalbergia volubilis (L.) Urb. -- not accepted
  Danthonia californica var. unispicata Thurb. -- not accepted
  Danthonia unispicata Thurb. -- not accepted
  Danthonia unispicata (Thurb.) Munro ex Macoun -- accepted -- onespike danthonia, onespike oatgrass
  Daphnopsis hellerana Urb. -- not accepted
  Daphnopsis helleriana Urb. -- accepted -- Heller's cieneguillo
  Daphnopsis philippiana Krug & Urb. -- accepted -- emajagua de sierra
  Daphnopsis phillippiana Krug & Urb. -- not accepted
  Dendropanax laurifolius (Marchal ex Urb.) R.C. Schneid. -- accepted -- palo de vaca
  Dendropemon bicolor Krug & Urb. -- accepted -- Puerto Rico leechbush
  Dendropemon caribaeum Krug & Urb. -- not accepted
  Dendropemon caribaeus Krug & Urb. -- accepted -- four-angle leechbush
  Dendropemon purpureum (L.) Krug & Urb. -- not accepted
  Dendropemon purpureus (L.) Krug & Urb. -- accepted -- smooth leechbush
  Dendropemon sintenisii Krug & Urb. -- not accepted -- hicaquillo
  Dendropemon stintenisii Krug & Urb. -- not accepted
  Dendrophthora flagelliformis (Lam.) Krug & Urb. -- accepted -- Caribbean tree destroyer
  Dendrophthora serpyllifolia (Griseb.) Krug & Urb. -- accepted -- Hispaniolan tree destroyer
  Desmodium axillare var. acutifolium (Kuntze) Urb. -- accepted -- zarzabacoa de monte
  Desmodium axillare var. obtusifoliola (Kuntze) Urb. -- not accepted
  Desmodium axillare var. obtusifolium (Kuntze) Urb. -- not accepted
  Desmodium axillare var. sintenisii Urb. -- not accepted
  Desmodium intortum (Mill.) Urb. -- accepted -- greenleaf tick trefoil, greenleaf ticktrefoil
  Desmodium wydlerianum Urb. -- accepted -- Wydler's ticktrefoil
  Deyeuxia bolanderi (Thurb.) Scribn. -- not accepted
  Deyeuxia bolanderi (Thurb.) Vasey -- not accepted
  Deyeuxia breweri (Thurb.) Vasey -- not accepted
  Deyeuxia crassiglumis (Thurb.) Vasey -- not accepted
  Diapedium krugii (Urb.) Britton -- not accepted
  Dichondra micrantha Urb. -- accepted -- Asian ponysfoot
  Dicliptera krugii Urb. -- accepted -- Krug's foldwing
  Digitaria digitata (Sw.) Urb. -- not accepted
  Digitaria leucocoma (Nash) Urb. -- not accepted
  Digitaria panicea (Sw.) Urb. -- accepted -- millet crabgrass
  Diospyros sintenisii (Krug & Urb.) Standl. -- accepted -- Guayabota
  Diospyros stintenisii (Krug & Urban) Standl. -- not accepted
  Dipholis bellonis Urb. -- not accepted
  Diplachne imbricata (Thurb.) Scribn. -- not accepted
  Diplazium plantaginifolium (L.) Urb. -- accepted -- plantainleaf twinsorus fern
  Distichlis marginata var. stricta (Torr.) Thurb. -- not accepted
  Distichlis maritima var. stricta (Torr.) Thurb. -- not accepted
  Distictella broadwayana Urb. -- not accepted
  Distictella racemosa (Bureau & K. Schum.) Urb. -- not accepted
  Drejerella tobagensis Urb. -- not accepted
  Dryopteris angustifolia (Willd.) Urb. -- not accepted
  Dryopteris cordata (Fée) Urb. -- not accepted
  Dryopteris decussata (L.) Urb. -- not accepted
  Dryopteris effusa (Sw.) Urb. -- not accepted
  Dryopteris hastata (Fée) Urb. -- not accepted
  Dryopteris megalodus (Schkuhr) Urb. -- not accepted
  Dryopteris nemorosa (Humb. & Bonpl. ex Willd.) Urb. -- not accepted
  Dryopteris opposita (Vahl) Urb. -- not accepted
  Dryopteris poiteana (Bory) Urb. -- not accepted
  Dryopteris reticulata (L.) Urb. -- not accepted
  Dryopteris subincisa (Willd.) Urb. -- not accepted
  Drypetes diversifolia Krug & Urb. -- accepted -- milkbark
  Drypetes ilicifolia (DC.) Krug & Urb. -- accepted -- rosewood
  Drypetes lateriflora (Sw.) Krug & Urb. -- accepted -- Guiana plum
  Duchartrea sintenisii (Urb.) Britton -- not accepted
  Duguetia tobagensis (Urb.) R.E. Fr. -- accepted
  Dussia Krug & Urb. ex Taub. -- accepted
  Eichhornia diversifolia (Vahl) Urb. -- accepted -- variableleaf water hyacinth
  Elaphoglossum firmum (Mett. ex Kuhn) Urb. -- not accepted
  Elaphoglossum peltatum (Sw.) Urb. -- accepted -- peltate tonguefern
  Elaphoglossum petiolatum (Sw.) Urb. -- accepted -- graceful tonguefern
  Elaphoglossum petiolatum var. petiolatum (Sw.) Urb. -- accepted
  Elaphoglossum rigidum (Aubl.) Urb. -- accepted -- stiff tonguefern
  Eleocharis flavescens (Poir.) Urb. -- accepted -- yellow spikerush
  Eleocharis flavescens var. flavescens (Poir.) Urb. -- accepted -- yellow spikerush
  Eleocharis retroflexa (Poir.) Urb. -- accepted -- coastal plain spikerush
  Eleusine glaucophylla (Courbai) Munro ex Benth. -- not accepted
  Eleutherine bulbosa (Mill.) Urb. -- accepted -- lagrimas de la virgen
  Elymus californicus (Boland. ex Thurb.) Gould -- not accepted -- California bottlebrush grass
  Elymus condensatus var. triticoides (Buckley) Thurb. -- not accepted
  Epidendrum blancheanum Urb. -- accepted -- Acuna's star orchid
  Episcia melittifolia var. guadelupensis (DC.) Urb. -- not accepted
  Episcia melittifolia var. typica Urb. -- not accepted
  Ericameria arizonica R.P. Roberts, Urbatsch & J.L. Anderson -- accepted
  Ericameria cuneata var. macrocephala Urbatsch -- accepted -- cliff goldenbush
  Ericameria linearifolia (DC.) Urbatsch & Wussow -- accepted -- narrowleaf goldenbush, slimleaf goldenbush
  Ericameria linearis (Rydb.) R.P. Roberts & Urbatsch -- accepted -- whitestem goldenbush
  Ericameria winwardii (Dorn & Delmatier) R.P. Roberts & Urbatsch -- accepted -- Winward's goldenbrush
  Erigeron polycladus Urb. -- accepted
  Eriochloa punctata var. subglabra (Nash) Urb. -- not accepted
  Eriocoma webberi Thurb. -- not accepted
  Erithalis revoluta Urb. -- not accepted
  Erodium laciniatum var. bovei (Delile) Murb. -- accepted -- cutleaf stork's bill
  Erythrina berteriana Urb. -- not accepted
  Erythrina berteroana Urb. -- accepted -- machete
  Eubrachion ambiguum var. jamaicense Krug & Urb. -- accepted -- tapeworm-plant
  Eugenia bellonis Krug & Urb. -- accepted -- Puerto Rico stopper
  Eugenia cordata var. sintenisii (Kiaersk.) Krug & Urb. -- accepted -- lathberry
  Eugenia fajardensis Krug & Urb. -- not accepted
  Eugenia monticola var. latifolia Krug & Urb. -- not accepted
  Eugenia rhombea (O. Berg) Krug & Urb. -- accepted -- red stopper
  Eugenia serrasuela Krug & Urb. -- accepted
  Eugenia stahlii (Kiaersk.) Krug & Urb. -- accepted -- Stahl's stopper
  Eupatorium dolicholepis (Urb.) Britton -- not accepted -- oreganillo
  Eupatorium geraniifolium Urb. -- not accepted -- geraniumleaf thoroughwort
  Eupatorium macropus Urb. -- not accepted
  Eupatorium mononeurum Urb. -- not accepted
  Eupatorium plicatum Urb. -- not accepted
  Eupatorium polyodon Urb. -- not accepted -- islandthicket thoroughwort
  Eupatorium portoricense Urb. -- not accepted -- Puerto Rico thoroughwort
  Eupatorium resinifluum Urb. -- not accepted
  Euphorbia adenoptera ssp. gundlachii (Urb.) Oudejans -- accepted
  Euphorbia barkeri Urb. & Ekman -- not accepted
  Euphorbia batabanensis Urb. -- not accepted
  Euphorbia biramensis Urb. -- not accepted
  Euphorbia bivonae ssp. tunetana Murb. -- accepted
  Euphorbia camagueyensis (Millsp.) Urb. -- accepted
  Euphorbia crassinodis Urb. -- accepted
  Euphorbia defoliata Urb. -- accepted
  Euphorbia dorsiventralis Urb. -- not accepted
  Euphorbia dussii Krug & Urb. ex Duss -- accepted
  Euphorbia eggersii Urb. -- accepted
  Euphorbia falcata var. maroccana Murb. -- not accepted
  Euphorbia filicaulis Urb. -- not accepted
  Euphorbia gundlachii Urb. -- not accepted
  Euphorbia gymnadenia Urb. -- not accepted
  Euphorbia gymnonota Urb. -- accepted
  Euphorbia helenae Urb. -- accepted
  Euphorbia helenae ssp. helenae Urb. -- accepted
  Euphorbia helwigii Urb. & Ekman -- accepted
  Euphorbia hepatica Urb. & Ekman -- accepted
  Euphorbia inflexa Urb. & Ekman -- accepted
  Euphorbia liliputiana C. Wright ex Urb. -- not accepted
  Euphorbia mangletii Urb. -- not accepted
  Euphorbia microclada Urb. -- not accepted
  Euphorbia microsperma (Murb.) K. Malý -- not accepted
  Euphorbia monensis (Millsp.) Urb. -- not accepted
  Euphorbia multinodis Urb. -- accepted
  Euphorbia niqueroana Urb. -- not accepted
  Euphorbia pachypoda Urb. -- not accepted
  Euphorbia parciflora Urb. -- accepted
  Euphorbia paucipila Urb. -- not accepted
  Euphorbia pinariona Urb. -- not accepted
  Euphorbia podocarpifolia Urb. -- accepted
  Euphorbia poliosperma Urb. -- not accepted
  Euphorbia polychroma ssp. microsperma (Murb.) Beck -- not accepted
  Euphorbia polychroma var. microsperma Murb. -- not accepted
  Euphorbia portoricensis Urb. -- not accepted
  Euphorbia portoricensis var. albescens Urb. -- not accepted
  Euphorbia portoricensis var. genuina Urb. -- not accepted
  Euphorbia torralbasii Urb. -- accepted
  Euphorbia troyana Urb. -- not accepted
  Euphorbia tuerckheimii Urb. -- accepted
  Euphorbia tunetana (Murb.) Vierh. ex Buxb. -- not accepted
  Euphorbia umbelliformis (Urb. & Ekman) V.W. Steinm. & P.E. Berry -- accepted
  Euphorbia villosula Urb. -- not accepted
  Euphorbia yayalesia Urb. -- not accepted
  Euphorbiodendron dussii (Krug & Urb. ex Duss) Millsp. -- not accepted
  Euphorbiodendron gymnonotum (Urb.) Millsp. -- not accepted
  Euphorbiodendron helenae (Urb.) Millsp. -- not accepted
  Euphorbiodendron troyanum (Urb.) Millsp. -- not accepted
  Euploca antillana (Urb.) Diane & Hilger -- accepted
  Ficus broadwayi Urb. -- not accepted
  Ficus tobagensis Urb. -- not accepted
  Forchhammeria brevipes Urb. -- accepted -- shortstalk forchhammeria
  Forestiera eggersiana Krug & Urb. -- accepted -- inkbush
  Forestiera segregata (Jacq.) Krug & Urb. -- accepted -- Florida privet, Florida swampprivet
  Forestiera segregata var. segregata (Jacq.) Krug & Urb. -- accepted -- Florida swampprivet
  Furcraea hexapetala (Jacq.) Urb. -- accepted -- Cuban hemp
  Galactia eggersii Urb. -- accepted -- Eggers' milkpea
  Galactia striata (Jacq.) Urb. -- accepted -- Florida hammock milkpea
  Gamochaeta antillana (Urb.) Anderb. -- accepted
  Garcinia portoricensis (Urb.) Alain -- accepted -- palo de cruz
  Gaumerocassia ekmaniana (Urb.) Britton ex Britton & Rose -- not accepted
  Gesneria acaulis var. grandifolia Urb. -- not accepted
  Gesneria acuminata Urb. -- not accepted
  Gesneria alpina (Urb.) Urb. -- accepted
  Gesneria aspera Urb. & Ekman -- accepted
  Gesneria barahonensis Urb. -- accepted
  Gesneria brachysepala Urb. & Ekman -- accepted
  Gesneria bracteosa Urb. -- not accepted
  Gesneria brevifolia Urb. -- accepted
  Gesneria bullata Urb. & Ekman -- accepted
  Gesneria calycosa var. alpina Urb. -- not accepted
  Gesneria celsioides (Griseb.) Urb. -- not accepted
  Gesneria christii Urb. -- accepted
  Gesneria citrina Urb. -- accepted -- yerba Puerto Rico de cueva
  Gesneria clandestina (Griseb.) Urb. -- accepted
  Gesneria cymosa Urb. -- not accepted
  Gesneria decapleura Urb. -- accepted
  Gesneria depressa (Griseb.) Urb. -- not accepted
  Gesneria dolichostyla Urb. -- not accepted
  Gesneria domingensis Urb. -- not accepted
  Gesneria duchartreoides (C.H. Wright) Urb. -- accepted
  Gesneria earlei Urb. & Britton -- accepted
  Gesneria ekmanii Urb. -- accepted
  Gesneria fawcettii Urb. -- not accepted
  Gesneria ferruginea (C.H. Wright) Urb. -- not accepted
  Gesneria gibberosa Urb. -- not accepted
  Gesneria glandulosa (Griseb.) Urb. -- accepted
  Gesneria gloxinioides (Griseb.) Urb. -- accepted
  Gesneria harrisii Urb. -- accepted
  Gesneria heterochroa Urb. -- accepted
  Gesneria heteroclada Urb. -- not accepted
  Gesneria hybocarpa Urb. & Ekman -- accepted
  Gesneria hypoclada Urb. & Ekman -- accepted
  Gesneria incisa Urb. -- not accepted
  Gesneria incurva (Griseb.) Urb. -- not accepted
  Gesneria lanceolata Urb. & Ekman -- accepted
  Gesneria leiocarpa Urb. & Britton -- not accepted
  Gesneria libanensis var. corrugata (Griseb.) Urb. -- not accepted
  Gesneria lindmanii Urb. -- not accepted
  Gesneria lomensis Urb. -- accepted
  Gesneria mimuloides (Griseb.) Urb. -- not accepted
  Gesneria mornincola Urb. & Ekman -- not accepted
  Gesneria norlindii Urb. -- not accepted
  Gesneria odontophylla Urb. & Ekman -- accepted
  Gesneria pachyclada Urb. -- not accepted
  Gesneria pauciflora Urb. -- accepted -- yerba maricao de cueva
  Gesneria purpurascens Urb. -- accepted
  Gesneria reticulata (Griseb.) Urb. -- accepted -- yerba neto hoja de cueva
  Gesneria rupincola Urb. -- accepted
  Gesneria salicifolia (Griseb.) Urb. -- accepted
  Gesneria salicifolia ssp. gibberosa (Urb.) Borhidi -- not accepted
  Gesneria salicifolia var. salicifolia (Griseb.) Urb. -- accepted
  Gesneria samuelssonii Urb. -- not accepted
  Gesneria scabra ssp. sphaerocarpa (Urb.) Borhidi -- not accepted
  Gesneria scabra var. fawcettii (Urb.) L.E. Skog -- accepted
  Gesneria scabra var. sphaerocarpa (Urb.) L.E. Skog -- accepted
  Gesneria scopulorum Urb. & Ekman -- not accepted
  Gesneria shaferi Urb. -- accepted
  Gesneria shaferi ssp. shaferi Urb. -- accepted
  Gesneria sintenisii Urb. -- not accepted
  Gesneria sphaerocarpa Urb. -- not accepted
  Gesneria subalata Urb. & Ekman -- not accepted
  Gesneria ventricosa f. obovata (Urb.) Stehlé -- not accepted
  Gesneria ventricosa f. ovata (Urb.) Stehlé -- not accepted
  Gesneria ventricosa ssp. cymosa (Urb.) L.E. Skog -- accepted
  Gesneria ventricosa var. ovata Urb. -- not accepted
  Gesneria vernicosa (Urb. & Ekman) Wiehler -- not accepted
  Gesneria viridiflora ssp. sintenisii (Urb.) L.E. Skog -- accepted -- grassflower
  Gesneria wrightii Urb. -- accepted
  Gnaphalium portoricense Urb. -- not accepted
  Gonocalyx portoricensis (Urb.) A.C. Sm. -- accepted -- Puerto Rico brittleleaf
  Gonolobus scandens Urb. -- not accepted
  Gonolobus tobagensis Urb. -- accepted
  Gouania lupuloides (L.) Urb. -- accepted -- whiteroot
  Gouania polygama (Jacq.) Urb. -- accepted -- liane savon
  Graffenrieda ottoschulzii (Urb. & Ekman) Urb. & Ekman -- accepted -- Petites Graines camasey
  Grammadenia sintenisii (Urb.) Mez -- not accepted
  Graphephorum flexuosum Thurb. ex A. Gray -- not accepted
  Guatteria blainii (Griseb.) Urb. -- accepted -- haya minga
  Guatteria caribaea Urb. -- accepted -- haya blanca
  Guettarda krugii Urb. -- accepted -- frogwood
  Guettarda laevis Urb. -- not accepted
  Guettarda ovalifolia Urb. -- accepted -- cucubano
  Guettarda pungens Urb. -- accepted -- roseta
  Guilandina divergens (Urb.) Britton -- not accepted
  Guilandina ovalifolia (Urb.) Britton -- not accepted
  Gundlachia corymbosa (Urb.) Britton ex Boldingh -- accepted -- yambush
  Gundlachia triantha (S.F. Blake) Urbatsch & R.P. Roberts -- accepted -- Trans-Pecos desert goldenrod
  Gyminda latifolia (Sw.) Urb. -- accepted -- falsebox, West Indian false box
  Gymnosiphon germainii Urb. -- not accepted
  Gymnosiphon niveus (Griseb.) Urb. -- accepted -- Puerto Rico yellowseed
  Gymnosiphon sphaerocarpus Urb. -- accepted -- mountain yellowseed
  Haemocharis portoricensis Krug & Urb. -- not accepted
  Haenianthus obovatus Krug & Urb. -- not accepted
  Haenianthus salicifolius var. obovatus (Krug & Urb.) Knobl. -- accepted -- palo de hueso
  Hebestigma Urb. -- accepted
  Hebestigma cubense (Kunth) Urb. -- accepted -- false locust
  Hebestigma cubense var. cubense (Kunth) Urb. -- accepted -- false locust
  Heleocharis flaccida (Rchb.) Urb. -- not accepted
  Heliotropium antillanum Urb. -- not accepted
  Heliotropium crispiflorum Urb. -- not accepted
  Heliotropium guanicense Urb. -- accepted -- cotorrilla
  Heppiella corymbosa (Sw.) Urb. -- not accepted
  Herrickia kingii (D.C. Eaton) Brouillet, Urbatsch & R.P. Roberts -- accepted -- King's aster
  Herrickia kingii var. barnebyana (S.L. Welsh & Goodrich) Brouillet, Urbatsch & R.P. Roberts -- accepted -- Barneby's aster
  Herrickia kingii var. kingii (D.C. Eaton) Brouillet, Urbatsch & R.P. Roberts -- accepted -- King's aster
  Hesperostipa neomexicana (Thurb.) Barkworth -- accepted -- New Mexico feathergrass, New Mexico needlegrass
  Heterosavia (Urb.) Petra Hoffm. -- accepted -- maidenbush
  Heterotrichum cymosum (Wendl. ex Spreng.) Urb. -- not accepted -- camasey terciopelo
  Hierochloe macrophylla Thurb. ex Bol. -- not accepted
  Hilaria rigida (Thurb.) Benth. ex Scribn. -- accepted
  Hippocratea caribaea Urb. -- not accepted
  Hirtella jamaicensis Urb. -- not accepted
  Hirtella multiflora Urb. -- not accepted
  Hybanthus linearifolius (Vahl) Urb. -- accepted -- chancleta
  Hybanthus portoricensis Urb. -- not accepted
  Hybosperma spinosum Urb. -- not accepted
  Hyperbaena laurifolia (Poir.) Urb. -- accepted -- limestone snakevine
  Hyptis americana (Aubl.) Urb. -- not accepted -- American bushmint
  Hyptis escobilla Urb. -- accepted -- bayamon
  Hystrix californica (Bol. ex Thurb.) Kuntze -- not accepted
  Icacorea glauciflora (Urb.) Britton -- not accepted
  Ilex sintenisii (Urb.) Britton -- not accepted -- Sintenis' holly
  Ionidium portoricense (Urb.) Krug & Urb. ex Britton & P. Wilson -- not accepted
  Ipomoea krugii Urb. -- not accepted -- Krug's white morning-glory, Krug's white morningglory
  Ipomoea palustris (Urb.) Urb. -- not accepted -- water morningglory
  Isachne rigidifolia (Poir.) Urb. -- accepted
  Jacquemontia havanensis (Jacq.) Urb. -- accepted -- Havana clustervine
  Jacquemontia verticillata (L.) Urb. -- accepted -- whorled clustervine
  Jacquinia stenophylla Urb. -- not accepted -- thicketwood
  Jaltomata antillana (Krug & Urb.) D'Arcy -- accepted -- Antilles false holly
  Jaquinia stenophylla Urb. -- not accepted
  Jatropha hernandiifolia var. portoricensis (Millsp.) Urb. -- accepted -- wild oilnut
  Jatropha pelargoniifolia Courbon -- accepted
  Justicia culebritae Urb. -- accepted -- Culebrita Island water-willow
  Justicia tobagensis (Urb.) Wassh. -- accepted
  Justicia verticillaris (Nees) Urb. -- not accepted
  Koanophyllon dolicholepis (Urb.) R.M. King & H. Rob. -- accepted -- oreganillo
  Koanophyllon plicatum (Urb.) R.M. King & H. Rob. -- not accepted
  Koanophyllon polyodon (Urb.) R.M. King & H. Rob. -- accepted -- islandthicket thoroughwort
  Krugiodendron Urb. -- accepted
  Krugiodendron ferreum (Vahl) Urb. -- accepted -- leadwood
  Lantana exarata Urb. & Ekman -- accepted -- Caribbean shrubverbena
  Lantana strigosa (Griseb.) Urb. -- accepted -- rough shrubverbena
  Laplacea portoricensis (Krug & Urb.) Dyer -- accepted -- nino de cota
  Lasiacis maculata (Aubl.) Urb. -- not accepted
  Lasianthus lanceolatus (Griseb.) Urb. -- accepted -- mata de peo
  Lepidaploa borinquensis (Urb.) H. Rob. -- accepted -- Puerto Rico ironweed
  Lepidaploa proctorii (Urbatsch) H. Rob. -- accepted -- Proctor's ironweed
  Leptochloa imbricata Thurb. -- not accepted
  Lepturus bolanderi Thurb. -- not accepted
  Leymus californicus (Bol. ex Thurb.) Barkworth -- accepted
  Lisianthius laxiflorus Urb. -- accepted -- campanilla amarilla
  Lobelia assurgens var. portoricensis (A. DC.) Urb. -- not accepted
  Lobelia portoricensis (Vatke) Urb. -- accepted -- tibey tupa
  Lonchocarpus glaucifolius Urb. -- accepted -- geno
  Lorandersonia Urbatsch, R.P. Roberts & Neubig -- accepted
  Lorandersonia baileyi (Wooton & Standl.) Urbatsch, R.P. Roberts & Neubig -- accepted -- Bailey's rabbitbrush
  Lorandersonia linifolia (Greene) Urbatsch, R.P. Roberts & Neubig -- accepted -- spearleaf rabbitbrush
  Lorandersonia microcephala (Cronquist) Urbatsch, R.P. Roberts & Neubig -- accepted
  Lorandersonia peirsonii (D.D. Keck) Urbatsch, R.P. Roberts & Neubig -- accepted -- Peirson's serpentweed
  Lorandersonia pulchella (A. Gray) Urbatsch, R.P. Roberts & Neubig -- accepted -- southwestern rabbitbrush
  Lorandersonia salicina (S.F. Blake) Urbatsch, R.P. Roberts & Neubig -- accepted -- willow glowweed
  Lorandersonia spathulata (L.C. Anderson) Urbatsch, R.P. Roberts & Neubig -- accepted -- Guadalupe rabbitbrush
  Lunania buchii Urb. -- not accepted
  Lunania ekmanii Urb. -- accepted -- mendrina
  Lycium tweedianum var. chrysocarpum (Urb. & Ekman) C.L. Hitchc. -- not accepted -- tropical desert-thorn
  Lyonia rubiginosa var. stahlii (Urb.) Judd -- not accepted -- Stahl's staggerbush
  Lyonia stahlii Urb. -- accepted -- Stahl's staggerbush
  Lyonia stahlii var. stahlii Urb. -- accepted -- Stahl's staggerbush
  Lyonia truncata Urb. -- accepted -- Dominican staggerbush
  Lysiloma ambiguum Urb. -- not accepted -- macata bourse bastard
  Maba sintenisii Krug & Urb. -- not accepted
  Macroptilium (Benth.) Urb. -- accepted -- bushbean
  Macroptilium atropurpureum (DC.) Urb. -- accepted -- purple bush-bean, purple bushbean
  Macroptilium lathyroides (L.) Urb. -- accepted -- wild bushbean
  Macroptilium lathyroides var. lathyroides (L.) Urb. -- not accepted -- wild bushbean
  Macroptilium lathyroides var. semierectum (L.) Urb. -- not accepted -- wild bushbean
  Magnolia splendens Urb. -- accepted -- laurel magnolia
  Marcgravia sintenisii Urb. -- accepted -- shingleplant
  Marcgravia tobagensis Urb. -- accepted
  Mariscus cayennensis (Lam.) Urb. -- not accepted
  Mariscus globulosus auct. non (Aubl.) Urb. -- not accepted
  Mariscus ligularis (L.) Urb. -- not accepted
  Mariscus planifolius (Rich.) Urb. -- not accepted
  Marssonia subacaulis (Griseb.) Urb. -- not accepted
  Mastichodendron portoricense (Urb.) Alain -- not accepted
  Mayepea axilliflora (Griseb.) Krug & Urb. -- not accepted
  Mayepea domingensis (Lam.) Krug & Urb. -- not accepted
  Maytenus cymosa Krug & Urb. -- accepted -- Caribbean mayten
  Maytenus elliptica (Lam.) Krug & Urb. ex Duss. -- not accepted
  Maytenus elongata (Urb.) Britton -- accepted -- Puerto Rico mayten
  Medicago aschersoniana Urb. -- not accepted
  Medicago polymorpha var. polygyra (Urb.) Shinners -- not accepted
  Meibomia sintenisii (Urb.) Britton -- not accepted
  Meibomia wydleriana (Urb.) Britton -- not accepted
  Melica aristata Thurb. ex Bol. -- accepted -- bearded melicgrass, bearded oniongrass
  Melica bulbosa Geyer ex Thurb. -- not accepted
  Melica imperfecta var. refracta Thurb. -- not accepted
  Meliosma obtusifolia Krug & Urb. -- accepted -- cacaillo
  Melocactus intortus (Mill.) Urb. -- accepted -- Turk's cap
  Melocactus intortus ssp. intortus (Mill.) Urb. -- accepted
  Mentzelia albicaulis var. veatchiana (Kellogg) Urb. & Gilg -- not accepted
  Mentzelia decapetala (Pursh ex Sims) Urb. & Gilg -- accepted -- evening starflower, gumbo-lily, tenpetal blazingstar, tenpetal mentzelia, tenpetal stickleaf
  Mentzelia gracilenta var. veatchiana (Kellogg) Urb. & Gilg -- not accepted
  Mentzelia gracilis Urb. & Gilg. -- not accepted
  Mentzelia hirsutissima var. stenophylla (Urb. & Gilg) I.M. Johnst. -- not accepted -- hairy stickleaf
  Mentzelia incisa Urb. & Gilg -- accepted -- streambank blazingstar, streambank stickleaf
  Mentzelia jonesii (Urb. & Gilg) H.J. Thomp. & J.E. Roberts -- accepted -- Jones stickleaf, Jones' blazingstar
  Mentzelia lindheimeri Urb. & Gilg -- accepted -- Lindheimer's blazingstar, Lindheimer's stickleaf
  Mentzelia nitens var. jonesii (Urb. & Gilg) J. Darl. -- not accepted
  Mentzelia pumila var. multiflora (Nutt.) Urb. & Gilg -- not accepted
  Mentzelia reverchonii (Urb. & Gilg) H.J. Thomp. & Zavort. -- accepted -- Reverchon's blazingstar
  Mentzelia texana Urb. & Gilg -- accepted -- Texas blazingstar
  Merathrepta unispicata (Thurb.) Piper -- not accepted
  Merremia aegyptia (L.) Urb. -- accepted -- hairy woodrose
  Merremia aegyptica (L.) Urb. -- not accepted
  Metopium toxiferum (L.) Krug & Urb. -- accepted -- Florida poisontree
  Miconia ottoschulzii Urb. & Ekman -- not accepted -- petites graines camasey
  Miconia pycnoneura Urb. -- accepted -- ridge johnny berry, ridge johnnyberry
  Micropholis curvata (Pierre) Pierre & Urb. -- not accepted
  Microtea portoricensis Urb. -- accepted -- Puerto Rico jumby pepper
  Mikania fragilis Urb. -- accepted -- fragile hempvine
  Mikania latifolia var. dominicensis Urb. -- not accepted
  Mikania odoratissima Urb. -- accepted -- fragrant hempvine
  Mikania pachyphylla Urb. -- accepted -- Luquillo Mountain hempvine
  Mikania porosa Urb. -- accepted -- Puerto Rico hempvine
  Mitracarpus frigidus var. portoricensis Urb. -- not accepted
  Mitracarpus polycladus Urb. -- accepted -- cana gorda girdlepod
  Mitracarpus portoricensis (Urb.) Urb. -- accepted -- Puerto Rico girdlepod
  Morongia portoricensis (Urb.) Britton -- not accepted
  Muhlenbergia comata (Thurb.) Thurb. ex Benth. -- not accepted
  Muhlenbergia distichophylla var. mutica Scribn. ex Urbina -- not accepted
  Muhlenbergia filiformis (Thurb. ex S. Watson) Rydb. -- accepted -- pullup muhly
  Muhlenbergia filiformis var. filiformis (Thurb. ex S. Watson) Rydb. -- accepted -- pullup muhly
  Muhlenbergia pungens Thurb. ex A. Gray -- accepted -- sandhill muhly
  Muhlenbergia texana Thurb. ex Porter & J.M. Coult. -- not accepted
  Myrcia citrifolia (Aubl.) Urb. -- accepted -- red rodwood
  Myrcia citrifolia var. citrifolia (Aubl.) Urb. -- accepted -- red rodwood
  Myrcia paganii Krug & Urb. -- accepted -- ausu
  Myrcianthes fajardensis (Krug & Urb.) Alain -- not accepted
  Myroxylon buxifolium (A. Gray) Krug & Urb. -- not accepted
  Myroxylon pachyphyllum Krug & Urb. -- not accepted
  Myroxylon schwaneckeanum Krug & Urb. -- not accepted
  Myrtus bahamensis (Kiaersk.) Urb. -- not accepted
  Myrtus bellonis (Krug & Urb.) Burret -- not accepted
  Neonesomia Urbatsch & R.P. Roberts -- accepted
  Neonesomia palmeri (A. Gray) Urbatsch & R.P. Roberts -- accepted -- Texas desert goldenrod, Texas goldenweed
  Nepenthes burbidgeae Hook. f. ex Burb. -- accepted
  Nepenthes X harryana Burb. -- accepted
  Nestotus R.P. Roberts, Urbatsch & Neubig -- accepted -- goldenweed
  Nestotus macleanii (Brandegee) R.P. Roberts, Urbatsch & Neubig -- accepted -- Maclean's goldenweed
  Nestotus stenophyllus (A. Gray) R.P. Roberts, Urbatsch & Neubig -- accepted -- narrowleaf mock goldenweed
  Niphaea domingensis Urb. & Ekman -- not accepted
  Nuttallia reverchonii (Urb. & Gilg) W.A. Weber -- not accepted
  Ochroma pyramidale (Cav. ex Lam.) Urb. -- accepted -- balsa, bois flot, West Indian balsa
  Ocotea cuneata (Griseb.) Urb. -- not accepted
  Opuntia picardae Urb. -- not accepted
  Oreopanax dussi Krug & Urb. ex Duss -- not accepted
  Oreopanax dussii Krug & Urb. ex Duss -- accepted
  Ormosia krugii Urb. -- accepted -- peronia
  Ortholoma ambiguum (Urb.) Wiehler -- not accepted
  Ortholoma domingense (Urb.) Wiehler -- not accepted
  Oryzopsis exigua Thurb. -- not accepted -- little ricegrass
  Oryzopsis exigua var. exigua Thurb. -- not accepted
  Oryzopsis micrantha (Trin. & Rupr.) Thurb. -- not accepted
  Oryzopsis webberi (Thurb.) Benth. ex Vasey -- not accepted
  Osmia geraniifolia (Urb.) Britton & P. Wilson -- not accepted
  Ottoschulzia Urb. -- accepted
  Ottoschulzia cubensis (C. Wright ex Griseb.) Urb. -- accepted -- bellota
  Ottoschulzia rhodoxylon (Urb.) Urb. -- accepted -- palo de rosa, pincho palo de rosa
  Ouratea guildingi (Planch.) Urb. -- not accepted
  Ouratea guildingii (Planch.) Urb. -- accepted
  Ouratea littoralis Urb. -- accepted -- abey amarillo
  Ouratea striata (Tiegh.) Urb. -- accepted -- guanabanilla
  Oxalis domingensis Urb. -- not accepted
  Oxalis eggersii Urb. -- not accepted -- Eggers' woodsorrel
  Oxalis rugeliana Urb. -- accepted -- coamo
  Pachyrhizus erosus (L.) Urb. -- accepted -- yam bean
  Panicularia scabrella (Thurb.) Kuntze -- not accepted
  Panicum sanguinale var. digitatum (Sw.) Hack. ex Urb. -- not accepted
  Passiflora anadenia Urb. -- accepted -- tropical passionflower
  Passiflora tulae Urb. -- accepted -- mountain love in the mist
  Pectis leptocephala (Cass.) Urb. -- not accepted
  Pectis linearifolia Urb. -- accepted -- Florida chinchweed, Florida cinchweed
  Pectis portoricensis Urb. -- not accepted
  Pectis tenuicaulis Urb. -- accepted -- island chinchweed, island cinchweed
  Penstemon spectabilis Thurb. ex A. Gray -- accepted -- showy penstemon
  Penstemon spectabilis ssp. spectabilis Thurb. ex A. Gray -- not accepted -- showy penstemon
  Penstemon spectabilis var. spectabilis Thurb. ex A. Gray -- accepted -- showy penstemon
  Pentameris unispicata (Thurb.) A. Nelson & J.F. Macbr. -- not accepted
  Pentaraphia depressa (Griseb.) Urb. -- not accepted
  Peperomia cogniauxii Urb. -- accepted -- yerba de guava falso
  Peperomia portoricensis Urb. -- accepted -- Puerto Rico peperomia
  Peperomia robustior Urb. -- accepted -- grand peperomia
  Peperomia yabucoana Urb. & C. DC. -- accepted -- viper peperomia
  Petesioides pendula (Urb.) Britton -- not accepted
  Petesioides yunquensis (Urb.) Britton -- not accepted
  Phacelia neomexicana Thurb. ex Torr. -- accepted -- New Mexico phacelia, New Mexico scorpion-weed, New Mexico scorpionweed
  Phaseolus antillanus Urb. -- not accepted
  Philodendron marginatum Urb. -- not accepted -- Puerto Rico philodendron
  Phinaea pulchella ssp. domingensis (Urb. & Ekman) Borhidi -- not accepted
  Phinaea pulchella var. domingensis (Urb. & Ekman) C.V. Morton -- accepted
  Phlox triovulata Thurb. ex Torr. -- accepted -- three-seed phlox, threeseed phlox
  Phoradendron barahonae Urb. & Trel. -- not accepted -- island mistletoe
  Phoradendron chrysocarpum Krug & Urb. -- not accepted
  Phoradendron dichotomum (Bertero ex Spreng.) Krug & Urb. -- not accepted -- Bertero's mistletoe
  Phoradendron mucronatum (DC.) Krug & Urb. -- accepted -- needletip mistletoe
  Phoradendron racemosa (Aubl.) Krug & Urb. -- not accepted
  Phoradendron racemosum (Aubl.) Krug & Urb. -- accepted -- bigleaf mistletoe
  Phoradendron tetrapterum Krug & Urb. -- not accepted -- fourpart mistletoe
  Phthirusa bicolor (Krug & Urb.) Engl. -- not accepted
  Phthirusa caribaea (Krug & Urb.) Engl. -- not accepted
  Phthirusa sintenisii (Krug & Urb.) Engl. -- not accepted
  Phyllanthus juglandifolius var. polycladus (Urb.) G.L. Webster -- not accepted
  Phyllanthus pentaphyllus ssp. polycladus (Urb.) G.L. Webster -- accepted -- fivepetal leaf-flower
  Phyllanthus polycladus Urb. -- not accepted
  Picramnia antillana (Eggers) Urb. -- not accepted
  Picrasma antillana (Eggers) Urb. -- not accepted -- bitter ash
  Pictetia aculeata (Vahl) Urb. -- accepted -- fustic
  Pilea involucrata (Sims) Urb. -- accepted -- friendship plant
  Pilea krugii Urb. -- accepted -- Krug's clearweed
  Pilea leptophylla Urb. -- accepted -- Puerto Rico clearweed
  Pilea multicaulis Urb. -- accepted -- Liquillo Mountain clearweed
  Pilea richardi Urb. -- not accepted
  Pilea richardii Urb. -- accepted -- Richard's clearweed
  Pilea yunquensis (Urb.) Britton & P. Wilson -- accepted -- mountain clearweed
  Piptatherum exiguum (Thurb.) Dorn -- accepted -- little ricegrass
  Piptocarpha tetrantha Urb. -- accepted -- mountain ashdaisy
  Piptocoma antillana Urb. -- accepted -- Antilles velvetshrub
  Piriqueta caroliniana (Walter) Urb. -- not accepted
  Piriqueta caroliniana var. exasperata Urb. -- not accepted
  Piriqueta caroliniana var. glabra (DC.) Urb. -- not accepted
  Piriqueta caroliniana var. tomentosa Urb. -- not accepted
  Piriqueta ovata (Bello) Urb. -- not accepted
  Pistacia taxiferum (L.) Krug & Urb. -- not accepted
  Pithecellobium arboreum (L.) Urb. -- not accepted
  Pleodendron ekmanii Urb. -- accepted
  Pleuraphis rigida Thurb. -- not accepted -- big galleta
  Plinia dussii (Krug & Urb.) Urb. -- not accepted
  Plumeria krugii Urb. -- accepted
  Plumeria portoricensis Urb. -- not accepted
  Poa californica (Munro ex Thurb.) Scribn. -- not accepted
  Poa exilis Murb. ex Asch. & Graebn. -- not accepted
  Poa exilis (Tomm. ex Freyn) Murb. -- not accepted
  Poa pauciflora (Thurb.) Benth. ex Vasey -- not accepted
  Poa scabrella (Thurb.) Benth. ex Vasey -- not accepted
  Podosemum pungens (Thurb. ex A. Gray) Bush -- not accepted
  Poitea punicea (Urb.) Lavin -- accepted -- caracol illo
  Polygala hecatantha Urb. -- accepted -- West Indian milkwort
  Poraqueiba rhodoxylon Urb. -- not accepted
  Porophyllum leiocarpum (Urb.) Rydb. -- accepted -- yerba de peo
  Porophyllum macrocephalum var. leiocarpum Urb. -- not accepted
  Portulaca biloba Urb. -- accepted -- Cuban purslane
  Portulaca phaeosperma Urb. -- not accepted
  Portulaca poliosperma Urb. -- not accepted
  Pouteria dictyoneura ssp. fuertesii (Urb.) Cronquist -- accepted -- cocuyo
  Pouteria hotteana (Urb. & Ekman) Baehni -- accepted -- redmammee
  Prestonia tobagensis Urb. -- not accepted
  Pristimera caribaea (Urb.) A.C. Sm. -- not accepted -- bejuco prieto
  Priva portoricensis Urb. -- accepted -- Puerto Rico velvet bur, Puerto Rico velvetburr
  Proustia krugiana Urb. -- not accepted
  Prunus myrtifolia (L.) Urb. -- accepted -- West Indian cherry
  Psychotria grosourdyana (Baill.) Urb. -- not accepted
  Psychotria maleolens Urb. -- accepted -- cachimbo de gato
  Psychotria maricaensis Urb. -- accepted -- cachimbo de maricao
  Psychotria microdon (DC.) Urb. -- not accepted -- thicket wild coffee
  Ptychomeria portoricensis (Urb.) Schltr. -- not accepted
  Puccinellia scabrella (Thurb.) Ponert -- not accepted
  Rabdochloa imbricata (Thurb.) Kuntze -- not accepted
  Randia portoricensis (Urb.) Britton & Standl. -- accepted -- Puerto Rico indigoberry
  Ravenia urbanii Engl. ex Urb. -- accepted -- tortugo prieto
  Redfieldia flexuosa (Thurb. ex A. Gray) Vasey -- not accepted -- blowout grass
  Reynosia guama Urb. -- accepted -- guama
  Reynosia krugii Urb. -- accepted -- Krug's darlingplum
  Reynosia septentrionalis Urb. -- accepted -- darlingplum
  Reynosia uncinata Urb. -- accepted -- sloe
  Rheedia portoricensis Urb. -- not accepted
  Rhynchosia swartzii (Vail) Urb. -- accepted -- Swartz's snoutbean
  Rhytidophyllum auriculatum var. angustatum Urb. -- not accepted
  Rhytidophyllum auriculatum var. genuinum Urb. -- not accepted
  Rhytidophyllum auriculatum var. plumerianum (DC.) Urb. -- not accepted
  Rhytidophyllum auriculatum var. stipulare (Urb.) Urb. -- not accepted
  Rhytidophyllum bicolor Urb. -- accepted
  Rhytidophyllum caribaeum Urb. -- accepted
  Rhytidophyllum coccineum Urb. -- accepted
  Rhytidophyllum earlei (Urb. & Britton) C.V. Morton -- not accepted
  Rhytidophyllum exsertum ssp. villosulum (Urb.) Borhidi -- not accepted
  Rhytidophyllum grande var. phaeanthum Urb. -- not accepted
  Rhytidophyllum intermedium Urb. & Ekman -- not accepted
  Rhytidophyllum lanatum Urb. & Ekman -- accepted
  Rhytidophyllum leucomallon var. carneum Urb. & Ekman -- not accepted
  Rhytidophyllum leucomallon var. flavicans Urb. & Ekman -- not accepted
  Rhytidophyllum lomense (Urb.) C.V. Morton -- not accepted
  Rhytidophyllum minus Urb. -- accepted
  Rhytidophyllum rhodocalyx Urb. -- accepted
  Rhytidophyllum rupincola (Urb.) C.V. Morton -- not accepted
  Rhytidophyllum stipulare Urb. -- not accepted
  Rhytidophyllum tomentosum f. villosulum Urb. -- not accepted
  Rhytidophyllum tomentosum f. viscida Urb. -- not accepted
  Rhytidophyllum tomentosum var. appendiculatum Urb. -- not accepted
  Rhytidophyllum tomentosum var. nudum Urb. -- not accepted
  Rhytidophyllum vernicosum Urb. & Ekman -- accepted
  Rhytidophyllum villosulum (Urb.) C.V. Morton -- not accepted
  Rochefortia spinosa (Jacq.) Urb. -- accepted -- espino
  Rondeletia inermis (Spreng.) Krug & Urb. -- accepted -- cordobancillo
  Rondeletia portoricensis Krug & Urb. -- accepted -- Juan Tomas
  Rousselia humilis (Sw.) Urb. -- accepted -- shineseed
  Rudbeckia klamathensis P. Cox & Urbatsch -- accepted -- Klamath coneflower
  Rudbeckia texana (Perdue) P. Cox & Urbatsch -- accepted -- Rudbeckia texana, Texas coneflower
  Ruellia nudiflora (Engelm. & A. Gray) Urb. -- accepted -- violet wild petunia, wild petunia
  Ruellia nudiflora var. nudiflora (Engelm. & A. Gray) Urb. -- accepted -- violet wild petunia
  Rumex acetosella ssp. angiocarpus (Murb.) Murb. -- not accepted
  Rumex angiocarpus Murb. -- not accepted
  Rumex fennicus (Murb.) Murb. -- not accepted
  Rumex pulcher ssp. divaricatus (L.) Murb. -- not accepted
  Rumex pulcher var. divarticatus (L.) Murb. -- not accepted
  Sabatia cubensis (Griseb.) Urb. -- not accepted
  Sabinea punicea Urb. -- not accepted -- caracol illo
  Sachsia bahamensis Urb. -- not accepted
  Salvia thomasiana Urb. -- accepted -- Thomas' sage
  Sapium caribaeum Urb. -- not accepted -- gumtree
  Saracha antillana Krug & Urb. -- not accepted
  Sarcomphalus domingensis (Spreng.) Krug & Urb. -- not accepted
  Sarcomphalus reticulatus (Vahl) Urb. -- not accepted
  Sasa palmata (hort. ex Burb.) E.G. Camus -- accepted -- broadleaf bamboo
  Sasa palmata (hort. ex Burb.) Nakai -- not accepted
  Savastana macrophylla (Thurb. ex Bol.) Beal -- not accepted
  Scenedesmus obliquus (Turbin) Kutzing -- not accepted
  Schlegelia portoricensis (Urb.) Britton -- not accepted
  Schrankia portoricensis Urb. -- not accepted -- zarzarilla
  Scleria secans (L.) Urb. -- accepted -- razor grass
  Scolosanthus densiflorus auct. non Urb. -- not accepted -- maricao
  Scolosanthus grandifolius Krug & Urb. -- accepted -- espuela de galan
  Scolosanthus multiflorus auct. non (Sw.) Krug & Urb. -- not accepted
  Scribneria bolanderi (Thurb.) Hack. -- accepted -- Scribner's grass
  Selaginella plagiochila sensu Krug & Urb., non Baker -- not accepted
  Senna pendula var. stahlii (Urb.) H.S. Irwin & Barneby -- accepted -- Stahl's valamuerto
  Sesbania emerus (Aubl.) Urb. -- not accepted -- coffeebean, danglepod
  Setaria geniculata var. purpurascens (Kunth) Urb. -- not accepted
  Setaria glauca var. geniculata (Poir.) Urb. -- not accepted
  Setaria glauca var. purpurascens (Kunth) Urb. -- not accepted
  Setaria paractaenoides (Trin.) Urb. -- not accepted
  Sida antillensis Urb. -- accepted -- Antilles fanpetals
  Sideroxylon portoricense Urb. -- accepted -- Puerto Rico bully
  Simarouba tulae Urb. -- accepted -- aceitillo falso
  Siphoneugena dussii (Krug & Urb.) Proença -- accepted
  Solanum guanicense Urb. -- not accepted
  Solanum gundlachii Urb. -- accepted
  Solanum maestrense Urb. -- accepted
  Solanum schulzianum Urb. -- accepted
  Solanum selleanum Urb. & Ekman -- accepted
  Solanum troyanum Urb. -- accepted
  Spermacoce brachysepala (Urb.) Alain -- accepted
  Spermacoce floridana Urb. -- not accepted -- Florida false buttonweed
  Spermacoce sintenisii (Urb.) Alain -- not accepted -- West Indian false buttonweed
  Spermacoce tenuior var. floridana (Urb.) R.W. Long -- not accepted
  Sporobolus arizonicus Thurb. ex Vasey -- not accepted
  Sporobolus cryptandrus var. flexuosus (Thurb. ex Vasey) Thurb. -- not accepted
  Sporobolus filiformis (Thurb. ex S. Watson) Rydb. -- not accepted
  Sporobolus flexuosus (Thurb. ex Vasey) Rydb. -- accepted -- mesa dropseed
  Sporobolus gracillimus (Thurb. ex S. Watson) Vasey -- not accepted
  Stahlia monosperma (Tul.) Urb. -- accepted -- Cóbana negra
  Stellaria antillana Urb. -- accepted -- West Indian starwort
  Stellaria fennica auct. non (Murb.) Perfil. -- not accepted
  Stellaria media ssp. neglecta (Weihe) Murb. -- not accepted -- common chickweed
  Stenandrium tuberosum (L.) Urb. -- accepted -- mata espiritista
  Stenostomum obtusifolium (Urb.) Britton & P. Wilson -- accepted
  Stenostomum sintenisii (Urb.) Britton & P. Wilson -- accepted
  Stipa coronata Thurb. -- not accepted
  Stipa coronata var. coronata Thurb. -- not accepted -- crested stipa
  Stipa exigua (Thurb.) Columbus & J.P. Sm. -- not accepted
  Stipa neomexicana (Thurb.) Scribn. -- not accepted
  Stipa occidentalis Thurb. ex S. Watson -- not accepted
  Stipa occidentalis Thurb. ex Torr. -- not accepted
  Stipa occidentalis var. occidentalis Thurb. ex S. Wats. -- not accepted -- western needlegrass
  Stipa pennata var. neomexicana Thurb. -- not accepted
  Stipa webberi (Thurb.) B.L. Johnson -- not accepted
  Styrax portoricensis Krug & Urb. -- accepted -- palo de jazmin
  Symplocos lanata Krug & Urb. -- accepted -- nispero cimarron
  Symplocos latifolia Krug & Urb. -- not accepted -- broad-leaf sweetleaf
  Symplocos micrantha Krug & Urb. -- accepted -- aceitunilla
  Symplocos polyantha Krug & Urb. -- not accepted
  Tabebuia glomerata Urb. -- not accepted
  Tabebuia rigida Urb. -- accepted -- roble de sierra
  Tabebuia schumanniana Urb. -- accepted -- roble colorado
  Tabernaemontana oppositifolia (Spreng.) Urb. -- accepted
  Taonabo heptasepala (Krug & Urb.) Britton -- not accepted
  Taonabo luquillensis (Krug & Urb.) Britton -- not accepted
  Taonabo pachyphylla (Krug & Urb.) Britton -- not accepted
  Taonabo stahlii (Krug & Urb.) Britton -- not accepted
  Telanthera olivacea Urb. -- not accepted
  Tephrosia cathartica (Sessé & Moc.) Urb. -- not accepted
  Ternstroemia heptasepala Krug & Urb. -- accepted -- saintedwood
  Ternstroemia heptasepela Krug & Urb. -- not accepted
  Ternstroemia luquillensis Krug & Urb. -- accepted -- palo colorado
  Ternstroemia oligostemon Krug & Urb. -- accepted
  Ternstroemia stahlii Krug & Urb. -- accepted -- mamey de cura
  Tetramicra canaliculata (Aubl.) Urb. -- accepted -- serpentine wallflower orchid
  Tetrazygia biflora (Cogn.) Urb. -- accepted -- Florida tetrazygia, Puerto Rico clover ash
  Thibaudia krugii Urb. & Hoerold -- not accepted
  Thibaudia portoricensis Urb. -- not accepted
  Tithymalus epithymoides var. microspermus (Murb.) Soják -- not accepted
  Toiyabea R.P. Roberts, Urbatsch & Neubig -- accepted
  Toiyabea alpina (L.C. Anderson & Goodrich) R.P. Roberts, Urbatsch & Neubig -- accepted -- alpine serpentweed
  Torralbasia Krug & Urb. -- accepted
  Torralbasia cuneifolia (C. Wright ex A. Gray) Krug & Urb. -- accepted -- boje
  Torresia macrophylla (Thurb. ex Bol.) Hitchc. -- not accepted
  Trichantha ambigua (Urb.) Wiehler -- not accepted
  Trichantha domingensis (Urb.) Wiehler -- not accepted
  Trichilia triacantha Urb. -- accepted -- bariaco
  Tricuspis avenaceus (Kunth) Thurb. ex A. Gray -- not accepted
  Tridens albescens (Vasey) N.T. Burb. -- not accepted
  Trifolium isodon Murb. -- not accepted
  Triniteurybia Brouillet, Urbatsch & R.P. Roberts -- accepted
  Triniteurybia aberrans (A. Nelson) Brouillet, Urbatsch & R.P. Roberts -- accepted -- Idaho goldenweed
  Triumfetta excisa Urb. -- not accepted
  Trophis racemosa (L.) Urb. -- accepted -- white ramoon
  Turnera diffusa var. aphrodisiaca (Ward) Urb. -- accepted -- damiana
  Turnera ulmifolia var. intermedia Urb. -- not accepted
  Uncinia hamata (Sw.) Urb. -- accepted -- birdcatching sedge
  Urera chlorocarpa Urb. -- accepted -- ortiga
  Varronia bahamensis (Urb.) Millsp. -- accepted -- Bahama manjack
  Varronia bellonis (Urb.) Britton -- accepted -- serpentine manjack
  Varronia rupicola (Urb.) Britton -- accepted -- Puerto Rico manjack
  Vaseya Thurb. -- not accepted
  Vaseya comata Thurb. -- not accepted
  Vernonia borinquensis Urb. -- not accepted -- Puerto Rico ironweed
  Vernonia gigantea ssp. ovalifolia (Torr. & A. Gray) Urbatsch -- not accepted -- giant ironweed
  Vernonia proctori Urbatsch -- not accepted -- Proctor's ironweed
  Vernonia proctorii Urbatsch -- not accepted
  Vigna antillana (Urb.) Fawc. & Rendle -- accepted -- Antilles bean
  Vilfa depauperata var. filiformis Thurb. ex S. Watson -- not accepted
  Vilfa filiculmis Thurb. ex Vasey -- not accepted
  Vilfa filiculmis Thurb. ex Scribn. -- not accepted
  Vilfa gracillima Thurb. ex S. Watson -- not accepted
  Waldsteinia pendula (Urb.) Mez -- accepted -- nodding barren strawberry
  Wallenia pendula (Urb.) Mez -- not accepted
  Wallenia yunquensis (Urb.) Mez -- accepted -- el yunque jacanillo
  Waltheria calcicola Urb. -- accepted -- raichie
  Xolisma stahlii (Urb.) Small -- not accepted
  Xolisma truncata (Urb.) Small -- not accepted
  Xylosma pachyphylla (Krug & Urb.) Urb. -- accepted -- spiny logwood
  Xylosma schwaneckeana (Krug & Urb.) Urb. -- accepted -- Schwaneck's logwood
  Zamia portoricensis Urb. -- accepted
  Zanthoxylum thomasianum (Krug & Urb.) Krug & Urb. ex P. Wilson -- accepted -- prickly-ash, St. Thomas prickly-ash, St. Thomas pricklyash
  Zeugites haitiensis (Pilg.) Urb. -- not accepted
 
 Kingdom Bacteria
  Acetobacterium bakii Kotsyurbenko et al., 1997 -- valid
  Acetobacterium fimetarium Kotsyurbenko et al., 1997 -- valid
  Acetobacterium paludosum Kotsyurbenko et al., 1997 -- valid
  Alcaligenes faecalis Castellani and Chalmers, 1919 emend. Rehfuss and Urban, 2005 -- valid
  Alcaligenes faecalis phenolicus Rehfuss and Urban, 2006 -- valid
  Aliivibrio Urbanczyk et al., 2007 emend. Beaz-Hidalgo et al., 2010 -- valid
  Aliivibrio fischeri (Beijerinck, 1889) Urbanczyk et al., 2007 -- valid
  Aliivibrio logei (Harwood et al., 1980) Urbanczyk et al., 2007 -- valid
  Aliivibrio salmonicida (Egidius et al., 1986) Urbanczyk et al., 2007 -- valid
  Aliivibrio wodanis (Lunder et al., 2000) Urbanczyk et al., 2007 -- valid
  Clostridium fimetarium Kotsyurbenko et al., 1997 -- valid
  Ketogulonicigenium Urbance et al., 2001 -- valid
  Ketogulonicigenium robustum Urbance et al., 2001 -- valid
  Ketogulonicigenium vulgare Urbance et al., 2001 -- valid
  Rhodococcus phenolicus Rehfuss and Urban, 2006 -- valid
   

A gray bar