Shrub to 3 m (9 ft) tall. Stems brown to gray, glabrous, more or less striate. Leaves 15-20 cm (6-8 in) long. Leaflets usually 11-19, elliptic to ovate, 2.5-5 cm (1-2 in) long and 1-2.5 cm (0.4-1 in) wide, rounded or notched at apex. Inflorescence a spike 10-20 cm (4-8 in) long. Flowers numerous, small, with large gland-dots on the calyx. Fruits legumes about 5 mm (0.15 in) long.
Distribution: Southwestern Arkansas and southeastern Oklahoma.
Habitat: Banks of creeks and rivers.
NWI status: none
Comment: This species is similar to A. nitens and is difficult to distinguish from it. Amorpha means "without form" and refers to the one-petaled flowers; ouachitensis refers to its discovery in the Ouachita Mountains.
Distribution in Oklahoma: 
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Last update: 9/8/99
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