As classified in WFO snapshot
December 2024
Warning: older classification
form
Equisetum hyemale f. geminatum
(S.F.Blake) Vict.
This form name was first published in Contr. Lab. Bot. Univ. Montréal 9: 96 (1927)
This form name has been reclassified since this snapshot. Its current preferred usage is a synonym .