Osmundastrum cinnamomeum(L.) C.Presl

cinnamon fern

WFO wfo-0001113307 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Osmundastrum cinnamomeum, photographed by Mary E. Macaulay, P.Eng.
fig. a Mary E. Macaulay, P.Eng., CC BY 4.0 / 2022-06-13 / obs. 205965721
Osmundastrum cinnamomeum, photographed by Pierre Cartier
fig. b Pierre Cartier, CC0 1.0 / obs. 205011466
Osmundastrum cinnamomeum, photographed by Pierre Cartier
fig. c Pierre Cartier, CC0 1.0 / obs. 205589834
Osmundastrum cinnamomeum, photographed by Quinten Wiegersma
fig. d Quinten Wiegersma, CC BY 4.0 / obs. 205336095
Osmundastrum cinnamomeum, photographed by Ryan Sorrells
fig. e Ryan Sorrells, CC BY 4.0 / obs. 205674402
Osmundastrum cinnamomeum, photographed by Tom Scavo
fig. f Tom Scavo, CC BY 4.0 / obs. 205099126
Osmundastrum cinnamomeum, photographed by Annie Weissman
fig. g Annie Weissman, CC BY 4.0 / obs. 205340846
Osmundastrum cinnamomeum, photographed by Lynn Harper
fig. h Lynn Harper, CC0 1.0 / obs. 203977022

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Also published as 36 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.

  • Anemia bipinnata Sw.
  • Anemia bipinnata (L.) Sw.
  • Osmunda alata Goldie
  • Osmunda asiatica (Fernald) Ohwi
  • Osmunda bipinnata L.
  • Osmunda cinnamomea L.
  • Osmunda cinnamomea f. angusta Clute
  • Osmunda cinnamomea f. auriculata (Hopkins) Kittr.
  • Osmunda cinnamomea f. cornucopiafolia Clute
  • Osmunda cinnamomea f. crenulata Dix
  • Osmunda cinnamomea f. frondosa (Torr. & A.Gray) Britton
  • Osmunda cinnamomea f. glandulosa in Waters
  • Osmunda cinnamomea f. glandulosa Waters & Clute ex M.Broun
  • Osmunda cinnamomea f. imbricata (Kunze) Clute
  • Osmunda cinnamomea f. incisa (Huntington) Gilbert
  • Osmunda cinnamomea f. latipinnula S.F.Blake
  • Osmunda cinnamomea f. succumbens C.W.Kinney
  • Osmunda cinnamomea f. trifolia Clute
  • Osmunda cinnamomea subsp. asiatica (Fernald) Fraser-Jenk.
  • Osmunda cinnamomea var. achilleifolia Hook.
  • Osmunda cinnamomea var. asiatica Fernald
  • Osmunda cinnamomea var. auriculata Hopkins
  • Osmunda cinnamomea var. bipinnatifida Clute
  • Osmunda cinnamomea var. fokienense Copel.

and 12 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.