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

Calystegia sepium var. americana (Sims) Matsuda, Rep. Inst. Sci. Res. Manchoukuo 3(App. 1): 365 (1939).

This name is a synonym.

Homotypic Names:
Accepted Name:	Calystegia sepium subsp. americana (Sims) Brummitt, Ann. Missouri Bot. Gard. 52: 216 (1965).
Family:	Convolvulaceae
* Convolvulus sepium var. americanus Sims, Bot. Mag. 19: t. 732 (1804). Convolvulus americanus (Sims) J.W.Loudon, Ladies' Flower-gard. 2: 98 (1844), nom. illeg. Volvulus sepium var. americanus (Sims) Farw., Rep. (Annual) Commiss. Parks Boulevards Detroit 11: 81 (1900). Calystegia americana (Sims) Daniels, Univ. Missouri Stud., Sci. Ser. 1(2): 195 (1907), nom. illeg. Calystegia sepium subsp. americana (Sims) Brummitt, Ann. Missouri Bot. Gard. 52: 216 (1965). * Basionym/Replaced Synonym
Original Compiler:	George Staples