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Results of: Search in every Kingdom for Scientific Name containing 'Penstemon angustifolius'
 
 Kingdom Plantae
  Penstemon angustifolius Nutt. ex Pursh – accepted – broadbeard beardtongue, broad-beard beardtongue, narrowleaf penstemon
  Penstemon angustifolius ssp. caudatus (A. Heller) D.D. Keck – not accepted
  Penstemon angustifolius ssp. venosus D.D. Keck – not accepted
  Penstemon angustifolius var. angustifolius Nutt. ex Pursh – accepted – broadbeard beardtongue, broad-beard beardtongue
  Penstemon angustifolius var. caudatus (A. Heller) Rydb. – accepted – broadbeard beardtongue
  Penstemon angustifolius var. dulcis Neese – accepted – broadbeard beardtongue
  Penstemon angustifolius var. venosus (D.D. Keck) N.H. Holmgren – accepted – broadbeard beardtongue, broadbeard penstemon
  Penstemon angustifolius var. vernalensis N.H. Holmgren – accepted – broadbeard beardtongue
   

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