Climbing Dogbane

Trachelospermum difforme (Walt.) A. Gray, Syn
Fl. N. Am. 2^: 85. 1878.
Echites difformis Walt. Fl. Car. 98. 1788.
Echites puherula Michx. Fl. Bor. Am. 1: 120. 1803
Tabernaemontana populifolia Poir. in Lam, Encyc. Suppl. 5: 276. 1817
lEchttes tomentosa Raf. Fl. Ludov. 46. 1817. Not £. tomentosa Vahl. 1794.
Echites sahctfoha Raf. New Fl. 4: 59. 1838. Not E. salicifolia Willd. 1819.
Forsteroma dtfformis A. DC. in DC. Prodr. 8: 437. 1844
Thyrsanihus populifoUus Miers, Apoc. S. Am. 99, 1878.
Tkyrsanihus difformis Miers, Apoc. S. Am. 99. 1878.
Fruticose or suffruticose liana, glabrous to variously puberulent ; leaves extremely variable, and not infrequently heterophyllous on u single plant, thinly membranaceous, elliptic to obovate-elliptic, occasionally linear-elliptic or suborbicular, 2.5-12 cm. long, 0.4-7.5 cm. broad, acuminate, occasionally very shortly and abruptly so, acute to obtuse, or sometimes rounded at the base, the petioles 1-15 mm, long; inflorescence thyrsiform, alternate-axillary, bearing numerous small pale-yellow flowers; pedicels 4-7 mm. long; calyx-lobes ovate-lanceolate, acuminate, 3-4 mm. long, minutely and rather sparsely barbellate at the tips; corolla salverform or subinfundibuliform, the tube 5.5-6.5 mm. long, 0.8-1 mm. in diameter at the base, somewhat inflated at the orifice, the lobes obliquely obovate, 3-4 mm. long, spreading; follicles slender, obscurely undulatearticulate to essentially continuous, 15-23 cm. long, glabrous.
Type locality: [South] Carolina.
Distribution: Southeastern coastal plain of the United States from Delaware to Texas, and northward in the Mississippi Valley to eastern Oklahoma, southeastern Missouri, southern Illinois, and southwestern Indiana.