Hymenophyllum demissum(Forst.) Sw.

drooping filmy fern

WFO wfo-0001043081 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Hymenophyllum demissum, photographed by Halema J
fig. a Halema J, CC BY 4.0 / 2022-05-01 / obs. 192747203
Hymenophyllum demissum, photographed by Lisa Bennett
fig. b Lisa Bennett, CC BY 4.0 / obs. 190550504
Hymenophyllum demissum, photographed by Christopher Stephens
fig. c Christopher Stephens, CC BY-SA 4.0 / obs. 186204678
Hymenophyllum demissum, photographed by Joe Dillon
fig. d Joe Dillon, CC BY 4.0 / obs. 184750098
Hymenophyllum demissum, photographed by Joe Dillon
fig. e Joe Dillon, CC BY 4.0 / obs. 183487476
Hymenophyllum demissum, photographed by Joe Dillon
fig. f Joe Dillon, CC BY 4.0 / obs. 183674597
Hymenophyllum demissum, photographed by Joe Dillon
fig. g Joe Dillon, CC BY 4.0 / obs. 182528612
Hymenophyllum demissum, photographed by Cara-Lisa Schloots
fig. h Cara-Lisa Schloots, CC BY 4.0 / obs. 179544452

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 10 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.

  • Hymenophyllum aucklandicum Bosch
  • Hymenophyllum australe var. aucklandicum (Bosch) C.Chr.
  • Hymenophyllum demissum var. megalocarpum (Colenso) C.Chr.
  • Hymenophyllum demissum var. polychilum (Colenso) Domin
  • Hymenophyllum erecto-alatum Colenso
  • Hymenophyllum megalocarpum Colenso
  • Hymenophyllum polychilum Colenso
  • Mecodium demissum (G.Forst.) Copel.
  • Sphaerocionium demissum C.Presl
  • Trichomanes demissum G.Forst.

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.