Distribution: Introduced and widely naturalized in eastern United States; occasional in the Rocky Mountains and westward.
Habitat: Waste land, roadsides.
Flowers: May - July
Conservation Status: Not of concern
Glabrous to appressed-pubescent, clambering perennial, the stems 0.5-1 m. tall.
Leaves pinnate, 6-12 cm. long, with well-developed tendrils; leaflets 12-18, linear, 1.5-3 cm. long, with a needle-like tip; stipules toothed to entire, 7-15 mm. long.
Inflorescence of axillary racemes, these longer than the peduncles and exceeding the leaves; flowers pea-like, 20-70. closely packed, 10-15 mm. long, pendulous, violet-purple; calyx half as long as the corolla, the tube 2-3 mm. long, oblique and slightly bulged, the upper 2 lobes very short, triangular, the lower 3 much longer; style densely bearded at the tip.
Pod 1.5-2 cm. long and 6-10 mm. broad, flattened, several-seeded.