An erect branching annual, 12-14 in. high, thinly clothed on the stem, petioles, both sides of the leaves, calyx and pods, with adpressed, centrally attached hairs. leaves 1-5 in. long, including the 1/3-1 in. long petiole, the lowest trifoliolate, the rest imparipinnate, with 2-3 pairs of opposite leaflets and a terminal one, 3/4-2 in. long, 3-7 lines broad, lanceolate-oblong, obtuse or truncate, entire or variably toothed, green, paler beneath; stipules about 1/4 in. long, subulate. Racemes axillary, longer than the leaves, erect, many-(20-or more-)flowered; peduncle 1 1/2-1 3/4 in. long; flowering part elongating and the flowers becoming rather distant, 2-5 in. long. Bracts 1-1 1/2 lin. long, subsetaceous, exceeding the buds and recurved. Calyx small; tube 1/2 lin. Long obliquely cup-shaped, 5-toothed; the 2 upper teeth about 1/4 lin. Long, obliquely cup-shaped, 5-toothed; the 2 upper teeth about 1/4 lin. Long, deltoid; the 3 lower teeth 1/2 lin. Long, subulate. Corolla glabrous, 3 1/2 lin. Long; vexillum ovate, acute, pale mauve, with darker veins and having two whitish spots at the base; alae slightly ovate-oblong, obtuse, mauve-purple; keel obtuse. Pods (immature) erect, linear-terete. Seeds several.
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