Plate 1 figs. a–h · 8 separate observations
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 99 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -1.9 °C | 2.8 °C | 6.1 °C |
| Warmest month, mean daily high | 17.8 °C | 23.3 °C | 33.0 °C |
| Annual rainfall | 475 mm | 1,178 mm | 2,267 mm |
| Rainfall in the driest quarter | 4 mm | 92 mm | 238 mm |
It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 99 research-grade observations of Syntrichia princeps 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 33 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.
- Barbula chrysopila Müll.Hal.
- Barbula megalocarpa Kindb.
- Barbula mollis Bruch & Schimp. ex Müll.Hal.
- Barbula muelleri Bruch & Schimp.
- Barbula princeps (De Not.) Müll.Hal.
- Barbula princeps var. brachycarpa (De Not.) Grav.
- Barbula pseudoantarctica Müll.Hal.
- Barbula semirubra Müll.Hal.
- Grimmia muelleri Bruch & Schimp. ex Unger & Kotschy
- Syntrichia echinata (Schiffn.) Herrnst. & Ben-Sasson
- Syntrichia mollis (Bruch & Schimp. ex Müll.Hal.) R.H.Zander
- Syntrichia princeps var. brachycarpa (De Not.) R.H.Zander
- Syntrichia princeps var. echinata (Schiffn.) R.H.Zander
- Syntrichia princeps var. parnassica (Schiffn.) Podp.
- Syntrichia ruralis var. spiralis (Herzog) R.H.Zander
- Tortula chrysopila (Müll.Hal.) Paris
- Tortula echinata Schiffn.
- Tortula megalocarpa (Kindb.) Broth.
- Tortula mollis (Bruch & Schimp. ex Müll.Hal.) Broth.
- Tortula muelleri Hook.f. & Wilson
- Tortula muelleri var. parnassica Schiffn.
- Tortula princeps De Not.
- Tortula princeps subsp. echinata (Schiffn.) W.A.Kramer
- Tortula princeps subsp. parnassica (Schiffn.) W.A.Kramer
and 9 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.
- 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.