Pachycaulos nummularia

Plate 1 figs. a–h · 5 observations

This species has been photographed under an open licence only 5 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.

Pachycaulos nummularia, photographed by Arthur de Jesús Chavarría Pérez — fig. a Arthur de Jesús Chavarría Pérez, CC BY 4.0 / 2021-07-16 / obs. 144450021

Pachycaulos nummularia, photographed by Sue Carnahan — fig. c Sue Carnahan, CC BY 4.0 / obs. 177367550

Pachycaulos nummularia, photographed by Dante Calienno — fig. h Dante Calienno, CC0 1.0 / obs. 150089062

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.

Native range 6 botanical countries

Native distribution of Pachycaulos nummularia, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.

Region	TDWG code	Continent
Costa Rica	COS	SOUTHERN AMERICA
Ecuador	ECU
Guatemala	GUA
Panamá	PAN
Peru	PER
Mexico Southeast	MXT	NORTHERN AMERICA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 43 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	7.8 °C	13.3 °C	15.0 °C
Warmest month, mean daily high	17.6 °C	20.8 °C	25.4 °C
Annual rainfall	1,402 mm	2,615 mm	3,645 mm
Rainfall in the driest quarter	39 mm	277 mm	426 mm

It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 43 research-grade observations of Pachycaulos nummularia 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 5 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.

Alloplectus nummularia (Hanst.) Wiehler
Columnea nummularia (Hanst.) Kuntze
Episcia truncicola Brandegee
Hypocyrta nummularia Hanst.
Neomortonia nummularia (Hanst.) Wiehler

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.
Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

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.