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Taxon author: Ralston & Hilsenb.

ITIS records citing taxon author "Ralston & Hilsenb."
 
 Kingdom Plantae
  Grusonia aggeria (Ralston & Hilsenb.) E.F. Anderson -- accepted
  Grusonia densispina (Ralston & Hilsenb.) Rebman -- accepted
  Opuntia aggeria Ralston & Hilsenb. -- not accepted -- Big Bend pricklypear
  Opuntia densispina Ralston & Hilsenb. -- not accepted -- Big Bend pricklypear
   

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