Pohlia cruda(Hedw.) Lindb.

Opal Thread-mosspohlia moss

WFO wfo-0001157892 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Pohlia cruda, photographed by Michael J. Papay
fig. a Michael J. Papay, CC BY 4.0 / 2022-02-21 / obs. 180285698
Pohlia cruda, photographed by Christian Berg
fig. b Christian Berg, CC BY 4.0 / obs. 126673764
Pohlia cruda, photographed by Randal
fig. c Randal, CC0 1.0 / obs. 124885375
Pohlia cruda, photographed by Braden J. Judson
fig. d Braden J. Judson, CC0 1.0 / obs. 120011763
Pohlia cruda, photographed by Randal
fig. e Randal, CC0 1.0 / obs. 110148270
Pohlia cruda, photographed by Randal
fig. f Randal, CC0 1.0 / obs. 83574603
Pohlia cruda, photographed by Randal
fig. g Randal, CC0 1.0 / obs. 82813028
Pohlia cruda, photographed by Randal
fig. h Randal, CC0 1.0 / obs. 71231253

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.

Where it actually grows measured, from 239 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -16.4 °C -4.7 °C 1.4 °C
Warmest month, mean daily high 13.9 °C 21.2 °C 24.6 °C
Annual rainfall 567 mm 1,304 mm 2,965 mm
Rainfall in the driest quarter 89 mm 188 mm 423 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 239 research-grade observations of Pohlia cruda that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 54 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.

  • Bryum austrocrudum Müll.Hal.
  • Bryum canadense Kindb.
  • Bryum capillare var. crudum (Hedw.) DC.
  • Bryum crudum (Hedw.) Turner
  • Bryum crudum var. minus Bruch & Schimp.
  • Bryum crudum var. subglobosum (Schimp.) C.Hartm.
  • Bryum erythrocaule Hampe
  • Bryum longescens Müll.Hal.
  • Bryum microapiculatum (Müll.Hal. & Kindb.) Müll.Hal.
  • Bryum synoicocrudum Müll.Hal.
  • Bryum viridatum Müll.Hal.
  • Hypnum crudum (Hedw.) F.Weber & D.Mohr
  • Lamprophyllum crudum (Hedw.) Lindb.
  • Mnium crudum Hedw.
  • Pohlia canadensis Broth.
  • Pohlia cruda f. bicolor (Matousch.) Podp.
  • Pohlia cruda f. irrorata (Loeske) Podp.
  • Pohlia cruda f. macrocarpa (Warnst.) Podp.
  • Pohlia cruda f. microcarpa (Warnst.) Podp.
  • Pohlia cruda var. alpina (I.Hagen) H.A.Möller
  • Pohlia cruda var. densa (Thér.) Podp.
  • Pohlia cruda var. elongata (L.I.Savicz) Podp.
  • Pohlia cruda var. imbricata (Cardot) E.B.Bartram
  • Pohlia cruda var. intermedia (Venturi) Podp.

and 30 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.
  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.