Pascopyrum smithii (Rydberg) Á. Löve nom. inval. Dataset Database of Vascular Plants of Canada (VASCAN) Rank SPECIES Classification class Equisetopsida order Poales family Poaceae genus Pascopyrum species Pascopyrum smithii Name Homonyms Pascopyrum smithii (Rydberg) Barkworth & D.R. Dewey Pascopyrum smithii (Rydberg) Á. Löve nom. inval.