Mnium hornumHedw.

horn calcareous moss

WFO wfo-0001187550 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Mnium hornum, photographed by Alexis Tinker-Tsavalas
fig. a Alexis Tinker-Tsavalas, CC BY 4.0 / 2022-06-11 / obs. 205479538
Mnium hornum, photographed by Alexis Tinker-Tsavalas
fig. b Alexis Tinker-Tsavalas, CC BY 4.0 / obs. 205478576
Mnium hornum, photographed by Alexis Tinker-Tsavalas
fig. c Alexis Tinker-Tsavalas, CC BY 4.0 / obs. 205478758
Mnium hornum, photographed by George Greiff
fig. d George Greiff, CC BY 4.0 / obs. 203471538
Mnium hornum, photographed by Daniel Cahen
fig. e Daniel Cahen, CC BY 4.0 / obs. 202819534
Mnium hornum, photographed by Zihao Wang
fig. f Zihao Wang, CC BY 4.0 / obs. 197568056
Mnium hornum, photographed by Zeke Marshall
fig. g Zeke Marshall, CC BY 4.0 / obs. 197430527
Mnium hornum, photographed by Zeke Marshall
fig. h Zeke Marshall, CC BY 4.0 / obs. 197190777

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 9 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.

  • Astrophyllum hornum (Hedw.) Lindb.
  • Bryum hornum (Hedw.) Crome
  • Bryum stellatum DC.
  • Hypnum hornum (Hedw.) F.Weber & D.Mohr
  • Mnium hornum var. rivulare Riehm.
  • Mnium hornum var. schultzii Warnst.
  • Mnium hornum var. sublaeve Milde ex Geh.
  • Mnium integrifolium Brid.
  • Polla horna (Hedw.) Brid.

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.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite. It has no native range either: Kew's checklist does not cover this taxon.