Hardenbergia violacea (coral-pea)

Plate 1 figs. a–h · 8 separate observations

Hardenbergia violacea, photographed by Greg Tasney — fig. a Greg Tasney, CC BY-SA 4.0 / 2022-06-09 / obs. 204575633

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 Hardenbergia violacea, 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
New South Wales	NSW	AUSTRALASIA
Queensland	QLD
South Australia	SOA
Tasmania	TAS
Victoria	VIC

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 2,190 in flower of 2,563 examined

28%

27%

23%

36%

67%

92%

98%

99%

89%

62%

34%

Proportion of examined Hardenbergia violacea in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	8	29	28%	15% to 46%
Feb	8	30	27%	14% to 44%
Mar	3	50	6%	2% to 16%
Apr	22	95	23%	16% to 33%
May	27	76	36%	26% to 47%
Jun	87	129	67%	59% to 75%
Jul	300	326	92%	89% to 95%
Aug	777	792	98%	97% to 99%
Sep	707	716	99%	98% to 99%
Oct	203	227	89%	85% to 93%
Nov	36	58	62%	49% to 73%
Dec	12	35	34%	21% to 51%

Peak flowering in Sep. Each bar is the share of Hardenbergia violacea 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. 2,190 of 2,563 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 1,975 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	1.4 °C	5.8 °C	11.4 °C
Warmest month, mean daily high	23.2 °C	25.4 °C	29.0 °C
Annual rainfall	648 mm	886 mm	1,408 mm
Rainfall in the driest quarter	75 mm	153 mm	218 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 1,975 research-grade observations of Hardenbergia violacea 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 39 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.

Caulinia bimaculata (Curtis) Kuntze
Caulinia monophylla (Vent.) F.Muell.
Caulinia monophylla var. trifoliolata F.Muell.
Glycine bimaculata Curtis
Glycine bimaculata Moench
Glycine monophylla (Vent.) J.Parm.
Glycine violacea Schneev.
Glycine virens Sol. ex Steud.
Hardenbergia alba R.T.Baker
Hardenbergia bimaculata (Curtis) Domin
Hardenbergia bimaculata var. cordata (Lindl.) Domin
Hardenbergia bimaculata var. longiracemosa (Lindl.) Domin
Hardenbergia bimaculata var. ovata (Sims) Domin
Hardenbergia bimaculata var. trifoliata (F.Muell.) Domin
Hardenbergia bimaculata var. typica Domin
Hardenbergia cordata (Lindl.) Benth.
Hardenbergia monophylla (Vent.) Benth.
Hardenbergia monophylla f. longiracemosa (Lindl.) Voss
Hardenbergia monophylla f. rosea Voss
Hardenbergia monophylla var. alba (R.T.Baker) Guilf.
Hardenbergia monophylla var. dennisae Guilf.
Hardenbergia monophylla var. fruticosa Guilf.
Hardenbergia monophylla var. longiracemosa (Lindl.) F.M.Bailey
Hardenbergia monophylla var. ovata F.M.Bailey

and 15 more.

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.