Cynanchum acutum

Plate 1 figs. a–h · 8 separate observations

Cynanchum acutum, photographed by Вячеслав Юсупов — fig. b Вячеслав Юсупов, CC BY 4.0 / obs. 203921489

Cynanchum acutum, photographed by Юрий Данилевский (Yuriy Danilevsky) — fig. c Юрий Данилевский (Yuriy Danilevsky), CC BY 4.0 / obs. 164253919

Cynanchum acutum, photographed by Galyna Mykytynets — fig. d Galyna Mykytynets, CC BY 4.0 / obs. 172562837

Cynanchum acutum, photographed by Katja Schulz — fig. e Katja Schulz, CC BY 4.0 / obs. 154813011

Cynanchum acutum, photographed by Anna Petrosyan — fig. f Anna Petrosyan, CC BY 4.0 / obs. 164035939

Cynanchum acutum, photographed by Виктория Билоус — fig. g Виктория Билоус, CC BY 4.0 / obs. 152463550

Cynanchum acutum, photographed by Дима Орлов — fig. h Дима Орлов, CC0 1.0 / obs. 151170178

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 47 botanical countries

Native distribution of Cynanchum acutum, 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. Regions too small to draw at this scale are marked with a dot.

Region	TDWG code	Continent
Afghanistan	AFG	ASIA-TEMPERATE
Altay	ALT
China North-Central	CHN
Cyprus	CYP
East Aegean Is.	EAI
Inner Mongolia	CHI
Iran	IRN
Iraq	IRQ
Kazakhstan	KAZ
Kirgizstan	KGZ
Lebanon-Syria	LBS
Mongolia	MON
North Caucasus	NCS
Palestine	PAL
Saudi Arabia	SAU
Tadzhikistan	TZK
Tibet	CHT
Transcaucasus	TCS
Türkiye	TUR
Turkmenistan	TKM
Uzbekistan	UZB
West Siberia	WSB
Xinjiang	CHX
Albania	ALB	EUROPE
Baleares	BAL
Bulgaria	BUL
France	FRA
Greece	GRC
Italy	ITA
Kriti	KRI
Krym	KRY
NW. Balkan Pen.	YUG
Portugal	POR
Romania	ROM
Sicilia	SIC
South European Russia	RUS
Spain	SPA
Türkiye-in-Europe	TUE
Ukraine	UKR
Algeria	ALG	AFRICA
Canary Is.	CNY
Egypt	EGY
Libya	LBY
Morocco	MOR
Tunisia	TUN
Pakistan	PAK	ASIA-TROPICAL
West Himalaya	WHM

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 194 in flower of 255 examined

40%

95%

48%

26%

20%

Proportion of examined Cynanchum acutum in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	2	too few examined
Feb	0	0	too few examined
Mar	0	1	too few examined
Apr	0	1	too few examined
May	4	10	40%	17% to 69%
Jun	35	37	95%	82% to 99%
Jul	61	64	95%	87% to 98%
Aug	71	75	95%	87% to 98%
Sep	15	31	48%	32% to 65%
Oct	6	23	26%	13% to 46%
Nov	2	10	20%	6% to 51%
Dec	0	1	too few examined

Peak flowering in Jul. Each bar is the share of Cynanchum acutum 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. 194 of 255 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 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 22 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.

Cyathella cathayensis (Tsiang & H.D.Zhang) C.Y.Wu & D.Z.Li
Cynanchum acutum var. longifolium (G.Martens) Ledeb.
Cynanchum acutum var. monspeliacum (L.) Gren. & Godr.
Cynanchum cathayense Tsiang & H.D.Zhang
Cynanchum excelsum Desf.
Cynanchum fissum Pomel
Cynanchum hastatum Lam.
Cynanchum longifolium G.Martens
Cynanchum maritimum Salisb.
Cynanchum monspeliacum L.
Cynanchum orientale Willd. ex Spreng.
Cynanchum sibiricum Willd.
Cynanchum sibiricum var. triangularilobatum Rassulova & B.A.Sharipova
Cynanchum stellatum var. oblongolobatum Rassulova & B.A.Sharipova
Cynanchum stellatum var. obtusilobatum Rassulova & B.A.Sharipova
Cynanchum stellatum var. ovalilobatum Rassulova & B.A.Sharipova
Cynanchum stellatum var. ovoideolobatum Rassulova & B.A.Sharipova
Sarmasikia dondonaei Bubani
Sarmasikia gesneri Bubani
Solenostemma acutum (L.) Wehmer
Vincetoxicum acutum (L.) Kuntze
Vincetoxicum excelsum (Desf.) Kuntze

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.