Cynanchum

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Cynanchum
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In the foreground, Cynanchum aphyllum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Apocynaceae
Subfamily: Asclepiadoideae
Tribe: Asclepiadeae
Genus: Cynanchum
L.
Species

262, see text[1]

Synonyms[1]
List
    • Adelostemma Hook.f.
    • Ampelamus Raf.
    • Aphanostelma Schltr.
    • Bunburia Harv.
    • Cyathella Decne., non Brot., fungal name
    • Cynoctonum E.Mey. , nom. illeg.
    • Decanemopsis Costantin & Gallaud
    • Dicarpophora Speg.
    • Drepanostemma Jum. & H.Perrier
    • Enslenia Nutt., nom. illeg.
    • Exostegia Bojer ex Decne.
    • Flanagania Schltr.
    • Folotsia Costantin & Bois
    • Gilgia Pax
    • Glossonema Decne.
    • Graphistemma (Chapm. ex Benth.) Champ. ex Benth.
    • Holostemma R.Br.
    • Karimbolea Desc.
    • Mahafalia Jum. & H.Perrier
    • Mastostigma Stocks
    • Mellichampia A.Gray ex S.Watson
    • Metalepis Griseb.
    • Metaplexis R.Br.
    • Monostemma Turcz.
    • Nematostemma Choux
    • Nematuris Turcz.
    • Odontanthera Wight
    • Pentarrhinum E.Mey.
    • Perianthostelma Baill.
    • Petalostemma R.Br., nom. nud.
    • Platykeleba N.E.Br.
    • Prosopostelma Baill.
    • Psanchum Neck., opus utique oppr.
    • Pycnoneurum Decne.
    • Raphistemma Wall.
    • Rhodostegiella (Pobed.) C.Y.Wu & D.Z.Li
    • Roulinia Decne., nom. illeg.
    • Rouliniella Vail
    • Sarcocyphula Harv.
    • Sarcostemma R.Br.
    • Sarmasikia Bubani
    • Schizocorona F.Muell.
    • Seshagiria Ansari & Hemadri
    • Sichuania M.G.Gilbert & P.T.Li
    • Steinheilia Decne.
    • Symphyoglossum Turcz.
    • Telminostelma E.Fourn.
    • Urostelma Bunge
    • Voharanga Costantin & Bois
    • Vohemaria Buchenau
    • Ziervoglia Neck.

Cynanchum is a genus of about 300 species including some swallowworts, belonging to the family Apocynaceae. The taxon name comes from Greek kynos (meaning "dog") and anchein ("to choke"), hence the common name for several species is dog-strangling vine. Most species are non-succulent climbers or twiners. There is some evidence of toxicity.[2]

Morphology

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These plants are perennial herbs or subshrubs, often growing from rhizomes. The leaves are usually oppositely arranged and sometimes are borne on petioles. The inflorescences and flowers come in a variety of shapes.

Like other species of the milkweed family, these plants bear follicles, which are podlike dry fruits.

Distribution

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These species are found throughout the tropics and subtropics. Several species also grow in temperate regions.

Importance

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Species of the Cynanchum genus had traditional Chinese medicinal uses. The root of Cynanchum atratum is used in Chinese traditional medicine and called Bai wei (白薇).[3] Baishouwubenzophenone is used in Cynanchum wilfordii,[4] Cynanchum auriculatum (now Vincetoxicum auriculatum),[5] and Cynanchum bungei.[6]

Classification

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Cynanchum as defined in the late 20th century (to include about 400 species) is polyphyletic and is being broken up. Species are being moved to genera including Orthosia, Pentarrhinum, and Vincetoxicum, with a group of mostly Old World species staying in Cynanchum,[7][8] and old genera such as Raphistemma brought to synonymy. Revision of the genus taxonomy in 2023 identified two new synonyms: Vincetoxicum sibiricum f. linearifolium, described from Shandong, China in 1877, but long neglected and Cynanchum gobicum, previously believed to be endemic to Mongolia.[9]

Species

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As of February 2023, Plants of the World Online accepted the following species:[10]

Former species

References

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