Ptychostomum imbricatulum (dry calcareous bryum moss)

Plate 1 figs. a–h · 8 separate observations

Ptychostomum imbricatulum, photographed by Christian Berg — fig. a Christian Berg, CC BY 4.0 / 2022-04-07 / obs. 186727703

Ptychostomum imbricatulum, photographed by Stephen James McWilliam — fig. b Stephen James McWilliam, CC0 1.0 / obs. 180817379

Ptychostomum imbricatulum, photographed by Martin Purdy — fig. c Martin Purdy, CC BY 4.0 / obs. 160876176

Ptychostomum imbricatulum, photographed by Susan Marley — fig. g Susan Marley, CC BY 4.0 / obs. 117001188

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 147 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-15.1 °C	-5.7 °C	6.0 °C
Warmest month, mean daily high	18.1 °C	23.4 °C	29.7 °C
Annual rainfall	418 mm	802 mm	1,457 mm
Rainfall in the driest quarter	51 mm	116 mm	263 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 147 research-grade observations of Ptychostomum imbricatulum 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 155 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.

Brachymenium commutatum var. hispanicum Thér.
Bryum arenicola Cardot
Bryum austrobimum Broth.
Bryum badium (Brid.) Bruch ex H.Müll.
Bryum badium f. bicoloriforme (Torka) Podp.
Bryum badium f. caespiticiforme (Torka) Podp.
Bryum badium f. microcarpum (Warnst.) Podp.
Bryum badium var. bicoloriforme Torka
Bryum badium var. caespiticiforme Torka
Bryum badium var. microcarpum Warnst.
Bryum bakonyense Latzel
Bryum bakonyense var. tettyense Podp.
Bryum brevimucronatum (Bryhn ex C.E.O.Jensen) Broth.
Bryum caespiticium Hedw.
Bryum caespiticium f. anceps Podp.
Bryum caespiticium f. angustirete (Podp.) Podp.
Bryum caespiticium f. arenaceum (Podp.) Podp.
Bryum caespiticium f. brachycarpum (Warnst. ex G.Roth) Podp.
Bryum caespiticium f. cratopleurum Podp.
Bryum caespiticium f. erectum (Podp.) Podp.
Bryum caespiticium f. ericetorum (H.Klinggr.) Podp.
Bryum caespiticium f. flagellaceum (Warnst.) Podp.
Bryum caespiticium f. laxum Podp.
Bryum caespiticium f. littorale (Corb.) Podp.

and 131 more.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
USDA PLANTS Database. common name, checklist symbol BRCA71. public domain. 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.