Calomnion complanatum(Hook.f. & Wilson) Lindb.

WFO wfo-0001177759 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 3 observations

This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Calomnion complanatum, photographed by Saryu Mae 前 朝琉
fig. a Saryu Mae 前 朝琉, CC BY 4.0 / 2022-04-17 / obs. 190587582
Calomnion complanatum, photographed by Saryu Mae 前 朝琉
fig. b Saryu Mae 前 朝琉, CC BY 4.0 / obs. 174551704
Calomnion complanatum, photographed by Saryu Mae 前 朝琉
fig. c Saryu Mae 前 朝琉, CC BY 4.0 / obs. 190587625
Calomnion complanatum, photographed by Saryu Mae 前 朝琉
fig. d Saryu Mae 前 朝琉, CC BY 4.0 / obs. 174551892
Calomnion complanatum, photographed by Saryu Mae 前 朝琉
fig. e Saryu Mae 前 朝琉, CC BY 4.0 / obs. 190587757
Calomnion complanatum, photographed by Jeremy Rolfe
fig. f Jeremy Rolfe, CC BY 4.0 / obs. 12364171
Calomnion complanatum, photographed by Jeremy Rolfe
fig. g Jeremy Rolfe, CC BY 4.0 / obs. 12364173
Calomnion complanatum, photographed by Jeremy Rolfe
fig. h Jeremy Rolfe, CC BY 4.0 / obs. 12364175

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 38 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 3.5 °C 6.7 °C 10.0 °C
Warmest month, mean daily high 17.1 °C 19.3 °C 22.1 °C
Annual rainfall 1,274 mm 1,415 mm 1,770 mm
Rainfall in the driest quarter 230 mm 278 mm 363 mm

It is found where winters are cool but frost is light or absent. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 38 research-grade observations of Calomnion complanatum 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 2 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.

  • Calomnion laetum Hook.f. & Wilson
  • Gymnostomum complanatum Hook.f. & Wilson

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.