Equisetum hyemaleL.

rough horsetail

WFO wfo-0000748047 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Equisetum hyemale, photographed by Gunnar Bonk
fig. a Gunnar Bonk, CC BY-SA 4.0 / 2022-06-08 / obs. 204558943
Equisetum hyemale, photographed by Bella Sims
fig. b Bella Sims, CC0 1.0 / obs. 204884164
Equisetum hyemale, photographed by Joseph Aubert
fig. c Joseph Aubert, CC BY 4.0 / obs. 200911592
Equisetum hyemale, photographed by Aleksei Baushev
fig. d Aleksei Baushev, CC BY 4.0 / obs. 201643213
Equisetum hyemale, photographed by Aleksei Baushev
fig. e Aleksei Baushev, CC BY 4.0 / obs. 197887811
Equisetum hyemale, photographed by Екатерина Кропочева
fig. f Екатерина Кропочева, CC BY 4.0 / obs. 201980783
Equisetum hyemale, photographed by Zakqary Roy
fig. g Zakqary Roy, CC BY 4.0 / obs. 199164543
Equisetum hyemale, photographed by Étienne Léveillé-Bourret
fig. h Étienne Léveillé-Bourret, CC BY 4.0 / obs. 205645785

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Also published as 73 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Equisetum affine (Engelm. ex Rydb) Rydb.
  • Equisetum alpinum Schur
  • Equisetum asperrimum Gilib.
  • Equisetum californicum (Milde) G.N.Jones
  • Equisetum californicum f. herbaceum (A.A.Eaton) M.Broun
  • Equisetum fusco-zonatum Schur
  • Equisetum hyemale f. attenuatum Milde
  • Equisetum hyemale f. doellii Luerss.
  • Equisetum hyemale f. herbaceum (A.A.Eaton) M.Broun
  • Equisetum hyemale f. hondae (Satou) Nakaike
  • Equisetum hyemale f. minus (A.Braun ex Milde) Luerss.
  • Equisetum hyemale f. paleaceum (Schleich. ex A.Braun & Engelm.) Asch.
  • Equisetum hyemale f. paleaceum Rabenh.
  • Equisetum hyemale f. pumilum (A.A.Eaton) Scoggan
  • Equisetum hyemale f. ramigerum (A.Braun ex Milde) Luerss.
  • Equisetum hyemale f. ramosum A.A.Eaton
  • Equisetum hyemale f. viride (Milde) Luerss.
  • Equisetum hyemale subf. polystachyum (Milde) G.Piep.
  • Equisetum hyemale subsp. paleaceum (Schleich. ex A.Braun & Engelm.) R.C.V.Douin
  • Equisetum hyemale var. affine (Engelm.) A.A.Eaton
  • Equisetum hyemale var. brachiatum Strempel
  • Equisetum hyemale var. brevivaginatum Rosend.
  • Equisetum hyemale var. californica Farw.
  • Equisetum hyemale var. californicum Milde

and 49 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.