Cryptostegia madagascariensis (Madagascar rubbervine)

Plate 1 figs. a–h · 6 observations

This species has been photographed under an open licence only 6 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.

Cryptostegia madagascariensis, photographed by Marc Fradera-Soler — fig. a Marc Fradera-Soler, CC BY 4.0 / 2018-02-18 / obs. 13914625

Cryptostegia madagascariensis, photographed by Annika Lindqvist — fig. b Annika Lindqvist, CC BY 4.0 / obs. 2905862

Cryptostegia madagascariensis, photographed by Neptalí Ramírez Marcial — fig. c Neptalí Ramírez Marcial, CC BY 4.0 / obs. 1561570

Cryptostegia madagascariensis, photographed by Micha Baum — fig. d Micha Baum, CC BY-SA 4.0 / obs. 60487282

Cryptostegia madagascariensis, photographed by Abby Darrah — fig. f Abby Darrah, CC BY 4.0 / obs. 188819115

Cryptostegia madagascariensis, photographed by ritirene — fig. h ritirene, CC BY 4.0 / obs. 142779297

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 1 botanical country

Native distribution of Cryptostegia madagascariensis, 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
Madagascar	MDG	AFRICA

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.

Flowering 93 in flower of 130 examined

48%

64%

100%

75%

92%

67%

100%

47%

Proportion of examined Cryptostegia madagascariensis in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	12	25	48%	30% to 67%
Feb	9	14	64%	39% to 84%
Mar	12	12	100%	76% to 100%
Apr	12	16	75%	51% to 90%
May	11	12	92%	65% to 99%
Jun	12	13	92%	67% to 99%
Jul	2	4	too few examined
Aug	4	6	67%	30% to 90%
Sep	1	2	too few examined
Oct	4	4	too few examined
Nov	7	7	100%	65% to 100%
Dec	7	15	47%	25% to 70%

Peak flowering in Mar. Each bar is the share of Cryptostegia madagascariensis observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 93 of 130 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 3 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 4 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.

Cryptostegia glaberrima Hochr.
Cryptostegia madagascariensis var. glaberrima (Hochr.) Marohasy & P.I.Forst.
Cryptostegia madagascariensis var. madagascariensis
Cryptostegia madagascariensis var. septentrionalis Marohasy & P.I.Forst.

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.
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.