Calypogeia muelleriana(Schiffn.) Müll.Frib.

WFO wfo-0001196166 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Calypogeia muelleriana, photographed by Braden J. Judson
fig. a Braden J. Judson, CC0 1.0 / 2022-04-28 / obs. 196106032
Calypogeia muelleriana, photographed by Randal
fig. b Randal, CC0 1.0 / obs. 186148092
Calypogeia muelleriana, photographed by Braden J. Judson
fig. c Braden J. Judson, CC0 1.0 / obs. 177074231
Calypogeia muelleriana, photographed by Randal
fig. d Randal, CC0 1.0 / obs. 132336347
Calypogeia muelleriana, photographed by Randal
fig. e Randal, CC0 1.0 / obs. 114326139
Calypogeia muelleriana, photographed by Randal
fig. f Randal, CC0 1.0 / obs. 59357923
Calypogeia muelleriana, photographed by Randal
fig. g Randal, CC0 1.0 / obs. 44104449
Calypogeia muelleriana, photographed by Helen Waterman
fig. h Helen Waterman, CC BY 4.0 / obs. 138065116

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 235 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -10.5 °C -1.0 °C 3.7 °C
Warmest month, mean daily high 16.3 °C 20.9 °C 28.1 °C
Annual rainfall 636 mm 1,386 mm 4,093 mm
Rainfall in the driest quarter 102 mm 248 mm 441 mm

It is found where winters bring hard 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 235 research-grade observations of Calypogeia muelleriana 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 46 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.

  • Calypogeia acuta Steph.
  • Calypogeia adscendens (Nees) Warnst.
  • Calypogeia adscendens var. rivularis Warnst.
  • Calypogeia macrostipula Warnst.
  • Calypogeia macrostipula var. densissima Warnst.
  • Calypogeia macrostipula var. lacustris Mikut. ex Warnst.
  • Calypogeia macrostipula var. uliginosa Warnst.
  • Calypogeia muelleriana f. compacta (Meyl.) Bischl.
  • Calypogeia muelleriana f. leptoclada Warnst.
  • Calypogeia muelleriana f. schofieldii W.S.Hong
  • Calypogeia muelleriana f. shieldsii W.S.Hong
  • Calypogeia muelleriana f. tundrae Schljakov
  • Calypogeia muelleriana subsp. muelleriana
  • Calypogeia muelleriana var. erecta (Müll.Frib.) Müll.Frib.
  • Calypogeia muelleriana var. muelleriana
  • Calypogeia muelleriana var. subimmersa Warnst.
  • Calypogeia muelleriana var. terricola Warnst.
  • Calypogeia neesiana f. laxa (Meyl. ex Müll.Frib.) Jørg.
  • Calypogeia neesiana var. laxa Meyl. ex Müll.Frib.
  • Calypogeia neesiana var. rotundifolia Müll.Frib.
  • Calypogeia trichomanioides Warnst.
  • Calypogeia trichomanioides var. geophila Warnst.
  • Calypogeia trichomanioides var. helophila Warnst.
  • Calypogeia trichomanis f. adscendens Nees

and 22 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.

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.