Publication: Phytologist. 1: 369. 1843 (Nov. 1842.
selected vouchers: Not at WTU; WS?
Notes: Reported in WA by Lellinger (1985) but not recorded for WA in FNA.
FNA2: "The hybrid between Equisetum hyemale and E . variegatum , E . × mackaii , is often mistaken for small forms of E . hyemale."