Bromus purgans var. laeviglumis (Scribner ex Shear) Swallen Dataset Database of Vascular Plants of Canada (VASCAN) Rank VARIETY Classification class Equisetopsida order Poales family Poaceae genus Bromus species Bromus pubescens Name Homonyms Bromus purgans var. laeviglumis (Scribner ex Shear) Swallen