Equisetum palustre var. simplicissimum A. Braun & Engelmann Dataset Database of Vascular Plants of Canada (VASCAN) Rank VARIETY Classification class Equisetopsida order Equisetales family Equisetaceae genus Equisetum species Equisetum palustre Name Homonyms Equisetum palustre var. simplicissimum A. Braun & Engelmann