This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Herbs (the following species perennials with slender roots or rootstocks) with trailing, twining or erect stems. Leaves entire dentate or lobed, mostly cordate or sagittate and petioled. Flowers axillary, solitary or clustered, large, pink, purple or white. Sepals nearly equal or the outer larger, the calyx bractless or with a pair of bracts at its base. Corolla funnelform or campanulate, the limb plaited, 5-angled, 5-lobed, or entire. Stamens inserted on the tube of the corolla, included; filaments filiform, or dilated at the base. Ovary 1-2-celled, 4-ovuled; style filiform; stigmas 2, filiform, oblong, or ovoid. Capsule globose or nearly so, 1-4-celled, 2-4-valved. Seeds glabrous. [Latin, to roll together, or entwine.]
About 200 species, of wide distribution in tropical and temperate regions. Besides the following, some 30 others occur in the southern and western United States. Type species: Convolvulus sepium L.
Calyx with two large bracts at the base, which enclose it. Stems trailing or climbing.
Peduncles long, much longer than the petioles.
Stems 3°-10° long; leaves hastate, the auricles often dentate.
1. C. sepium.
Stems 1-3 long: leaves sagittate, the auricles rounded, entire.
2. C. repens.
Peduncles short, mostly not longer than the petioles.
Stem erect or ascending; flowers white; bracts not cordate.
4. C. spithamaens.
Calyx not bracted; peduncle bracted at the summit. Glabrous or nearly so; leaves entire, auriculate.
5. C. arvensis.
Canescent; leaves with 2-4 basal lobes.
6. C. incanus.
Convolvulus sepium L. Sp. Pl. 153. 1753. Convolvulus sepium var. amcricanus Sims, Bot.
Mag. pl. 732. 1804. Calystegia sepium R. Br. Prodr. Fl. Nov. Holl. 1:
Glabrous or sparingly pubescent; stems extensively trailing or high-twining, 3°-10° long. Leaves slender-petioled, triangular in outline, hastate, 2'-5' long, acute or acuminate at the apex, the basal lobes divergent, usually acute, angulate-dentate or entire; petioles ¥-2' long; peduncles 1-flowered, longer than the petioles, often 2-3 times as long; flowers pink with white stripes or white throughout, about 2' long; bracts at the base of the corolla, large, ovate, acute or obtuse, cordate; stigmas oblong.
In fields and thickets, usually in moist soil, Newfoundland to North Carolina, British Columbia, Illinois, Nebraska and New Mexico. Also in Europe and Asia. June-Aug. Bell-bind. Woodbind. Pear- or Devil's-vine. Lady's-nightcap. Hedge- or harvest-lily. Rutland beauty. Woodbine. German scammony. Creepers. Bracted-bindweed.
Convolvulus japonicus Thunb. Fl. Jap. 85. 1784, a species with narrow hastate leaves and smaller pink flowers, cultivated in a double-flowered form, has in this form escaped from cultivation from southeastern New York to the District of Columbia and Missouri.