Calasterella californica

Plate 1 figs. a–h · 8 separate observations

Calasterella californica, photographed by James C. Davis — fig. b James C. Davis, CC BY-SA 4.0 / obs. 183343296

Calasterella californica, photographed by Millie Basden — fig. c Millie Basden, CC BY 4.0 / obs. 182381458

Calasterella californica, photographed by Madeleine Claire — fig. d Madeleine Claire, CC BY 4.0 / obs. 181163895

Calasterella californica, photographed by Gail A Baker — fig. e Gail A Baker, CC BY 4.0 / obs. 187534526

Calasterella californica, photographed by Roger Raiche — fig. g Roger Raiche, CC BY 4.0 / obs. 180181614

Calasterella californica, photographed by Trevor Van Loon — fig. h Trevor Van Loon, CC BY 4.0 / obs. 177872745

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 2,016 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	2.8 °C	5.5 °C	9.3 °C
Warmest month, mean daily high	22.3 °C	29.7 °C	37.1 °C
Annual rainfall	276 mm	440 mm	1,087 mm
Rainfall in the driest quarter	4 mm	7 mm	23 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 2,016 research-grade observations of Calasterella californica 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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.

Asterella californica (Hampe ex Austin) Underw.
Fimbraria californica Hampe ex Austin

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.

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.