Araujia sericifera (white bladderflower)

Plate 1 figs. a–h · 8 separate observations

Araujia sericifera, photographed by Marc Riera — fig. a Marc Riera, CC BY 4.0 / 2022-06-08 / obs. 204450565

Araujia sericifera, photographed by Elizabete Marchante — fig. b Elizabete Marchante, CC BY 4.0 / obs. 203142825

Araujia sericifera, photographed by Greg Tasney — fig. d Greg Tasney, CC BY-SA 4.0 / obs. 201174055

Araujia sericifera, photographed by Leonel Roget — fig. g Leonel Roget, CC BY 4.0 / obs. 195140088

Araujia sericifera, photographed by Thomas Mesaglio — fig. h Thomas Mesaglio, CC BY 4.0 / obs. 193548485

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 5 botanical countries

Native distribution of Araujia sericifera, 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
Argentina Northeast	AGE	SOUTHERN AMERICA
Brazil South	BZS
Brazil Southeast	BZL
Paraguay	PAR
Uruguay	URU

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 549 in flower of 1,285 examined

70%

61%

35%

16%

29%

36%

40%

20%

33%

66%

Proportion of examined Araujia sericifera in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	190	271	70%	64% to 75%
Feb	116	191	61%	54% to 67%
Mar	49	142	35%	27% to 43%
Apr	22	140	16%	11% to 23%
May	2	80	3%	1% to 9%
Jun	22	77	29%	20% to 39%
Jul	21	59	36%	25% to 48%
Aug	25	62	40%	29% to 53%
Sep	11	56	20%	11% to 32%
Oct	12	61	20%	12% to 31%
Nov	17	52	33%	22% to 46%
Dec	62	94	66%	56% to 75%

Peak flowering in Jan. Each bar is the share of Araujia sericifera 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. 549 of 1,285 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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.

Where it actually grows measured, from 1,968 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	2.1 °C	7.1 °C	11.2 °C
Warmest month, mean daily high	21.6 °C	25.5 °C	29.3 °C
Annual rainfall	487 mm	903 mm	1,568 mm
Rainfall in the driest quarter	9 mm	135 mm	265 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 1,968 research-grade observations of Araujia sericifera 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. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 10 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.

Apocynum volubile Vell.
Araujia albens (Mart.) G.Don
Araujia calycina Decne.
Araujia hortorum E.Fourn.
Araujia sericifera f. calycina (Decne.) Malme
Araujia sericifera f. hortorum (E.Fourn.) Malme
Araujia sericifera f. hortorum (E.Fourn.) Augusto & Edesio
Araujia sericifera var. hortorum (E.Fourn.) Malme
Araujia undulata Vis.
Physianthus albens Mart.

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.