World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew

Cynanchum laxum Bartl. in W.D.J.Koch, Taschenb. Deut. Schweiz. Fl.: 350 (1843).

This name is a synonym.

Homotypic Names:
Accepted Name:	Vincetoxicum hirundinaria subsp. hirundinaria.
Family:	Apocynaceae
Vincetoxicum laxum (Bartl.) K.Koch, Linnaea 23: 590 (1850). Alexitoxicon laxum (Bartl.) St.-Lag., Ann. Soc. Bot. Lyon 9: 539 (1882). Vincetoxicum officinale f. laxum (Bartl.) Beck, Fl. Nieder-�sterreich 2(2): 945 (1893). Antitoxicum laxum (Bartl.) Pobed. in V.L.Komarov (ed.), Fl. URSS 18: 701 (1952). Vincetoxicum hirundinaria subsp. laxum (Bartl.) Poldini, Stud. Geobot. 21: 8 (2001).
Original Compiler:	R.Govaerts