Calystegia sepium subsp. americana

(Sims) Brummitt

Ann. Missouri Bot. Gard. 52: 216. 1965.

Weedy
Basionym: Convolvulus sepium var. americanus Sims Bot. Mag. 19: plate 732. 1804
Synonyms: C. americanus (Sims) J. W. Loudon
Treatment appears in FNA Volume 14.

Herbage usually pubescent to tomentose, sometimes glabrate or glabrous. Leaf blades ovate, basal lobes usually rounded or 1-pointed and not spreading, sometimes slightly spreading and 2-pointed, basal sinus acute. Bracts distinct from sepals, 16–25 × 10–20 mm, proximally flat or keeled, apex obtuse to rounded. Flowers: corolla pink, 45–70 mm; stamens 24–32 mm.


Phenology: Flowering Jul–Oct.
Habitat: Disturbed sites, grassy banks, rocky shores, salt marshes.

Distribution

St. Pierre and Miquelon, N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Conn., Del., Ill., Ind., Maine, Md., Mass., Mich., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Vt., Va., Wis., South America (Argentina, Uruguay), s Africa (Cape Peninsula, extinct?), Atlantic Islands (Azores, Tristan da Cunha).

Discussion

Selected References

None.

Lower Taxa

None.
Richard K. Brummitt† +
(Sims) Brummitt +
Convolvulus sepium var. americanus +
St. Pierre and Miquelon +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Del. +, Ill. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Vt. +, Va. +, Wis. +, South America (Argentina +, Uruguay) +, s Africa (Cape Peninsula +, extinct?) +, Atlantic Islands (Azores +  and Tristan da Cunha). +
Disturbed sites, grassy banks, rocky shores, salt marshes. +
Flowering Jul–Oct. +
Ann. Missouri Bot. Gard. +
C. americanus +
Calystegia sepium subsp. americana +
Calystegia sepium +
subspecies +