Equisetum hyemale var. pseudohyemale (Farwell) C.V. Morton

Equisetum hyemale var. pseudohyemale (Farwell) C.V. Morton is a synonym sensu FNA Ed. Comm., 1993 of:

Equisetum hyemale subsp. affine (Engelmann) Calder & Roy L. Taylor, an accepted subspecies name sensu FNA Ed. Comm., 1993.