Cytisus nigricans

Plate 1 figs. a–h · 8 separate observations

Cytisus nigricans, photographed by Gabriel Mayrhofer — fig. b Gabriel Mayrhofer, CC0 1.0 / obs. 155562139

Cytisus nigricans, photographed by Zoltán Stekkelpak — fig. e Zoltán Stekkelpak, CC0 1.0 / obs. 138099271

Cytisus nigricans, photographed by ihaerringer — fig. g ihaerringer, CC BY 4.0 / obs. 126361536

Cytisus nigricans, photographed by Christian Berg — fig. h Christian Berg, CC BY 4.0 / obs. 84372891

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 16 botanical countries

Native distribution of Cytisus nigricans, 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
Albania	ALB	EUROPE
Austria	AUT
Belarus	BLR
Bulgaria	BUL
Central European Russia	RUC
Czechia-Slovakia	CZE
East European Russia	RUE
Germany	GER
Greece	GRC
Hungary	HUN
Italy	ITA
NW. Balkan Pen.	YUG
Poland	POL
Romania	ROM
Switzerland	SWI
Ukraine	UKR

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 113 in flower of 124 examined

94%

98%

92%

86%

Proportion of examined Cytisus nigricans in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	0	0	too few examined
Apr	0	1	too few examined
May	2	2	too few examined
Jun	46	49	94%	83% to 98%
Jul	48	49	98%	89% to 100%
Aug	11	12	92%	65% to 99%
Sep	6	7	86%	49% to 97%
Oct	0	3	too few examined
Nov	0	0	too few examined
Dec	0	1	too few examined

Peak flowering in Jul. Each bar is the share of Cytisus nigricans 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. 113 of 124 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 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.

Where it actually grows measured, from 912 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-11.5 °C	-5.2 °C	-3.1 °C
Warmest month, mean daily high	21.2 °C	23.6 °C	25.8 °C
Annual rainfall	558 mm	709 mm	1,447 mm
Rainfall in the driest quarter	84 mm	111 mm	221 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 912 research-grade observations of Cytisus nigricans 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 32 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.

Calophaca nigricans (L.) B.Fedtsch.
Cytisus atratus Schur
Cytisus atropurpureus Benth.
Cytisus australis (Freyn ex Wohlf.) Rothm.
Cytisus glaber Lam.
Cytisus nigricans f. bifurcatus Waisb.
Cytisus nigricans f. elongatus (Willd.) Zabel
Cytisus nigricans f. pubescens Brizicky
Cytisus nigricans subsp. australis (Freyn ex Wohlf.) E.Mayer
Cytisus nigricans var. angustifolius Waisb.
Cytisus nigricans var. australis Freyn ex Wohlf.
Cytisus nigricans var. elongatus Willd.
Cytisus nigricans var. macrophyllus Waisb.
Cytisus nigricans var. mediterraneus Pant.
Cytisus nigricans var. nigricans
Cytisus nigricans var. reflexus Jacob-Makoy
Cytisus nigricans var. sericeus Rochel ex Andrae
Cytisus nigricans var. vulgaris Willd.
Cytisus pseudonigricans Schur
Cytisus sericeus Javorka
Cytisus unibracteatus Lindem.
Cytisus virgatus Salisb.
Genista nigricans (L.) Scheele
Laburnum nigricans (L.) J.Presl

and 8 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.
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.