Shrub 0.6-5 m tall; branches 3-6 mm thick, pubescence dense, short, tawny, spreading pilose on juvenile branches, becoming gray, glabrate, the internodes 1-4 cm long. Leaves trifoliolate, membranous, oblong lanceolate to oblong ovate, dark green with uncinate pubescence and occasional scattered hairs above, dull, pale green, moderately dense, velutinous pilose below, the apex long acuminate, the mucro to 2 mm long, the base rotund to weakly emarginate, 4-11.5 cm long, 2-5 cm wide, the veins impressed above, raised below, primary veins 8-12, al-ternate, straight with arcuate tips; petioles 4-S cm, angular, striate, densely tawny spreading pubescent; rachis 1-3 cm; stipules persistent, 6-8 mm long, 1.5-2 mm wide, attenuate, 1-2 mm, linear lanceolate, acute, striate, densely pilose; stipules persistent, terminal 4-7 mm long, lateral 6-10 mm long, 0.5-1 mm wide, linear, acute, densely pilose. Inflorescence an axillary few-flowered panicle, the flowers chasmogamous or cleistogamous, pubescent, in chasmogamous flowers the inflo-rescence 5.5-8 cm long, internodes 6-10 mm long, the lateral branches short, 4-6 mm long, 2-3 flowers per branch; bracts usually 2, 4-5 mm long, linear, acute, densely pilose; pedicels 3-5 mm; bracteoles persistent, 6 mm long, 1 mm wide, inserted 1-2 mm below the calyx, linear, acute, densely pilose; in cleistogamous flowers the inflorescences to 2 cm; bracts 2-3 mm long, the pedicels 2-3 mm long; bracteoles 3-4 mm. Flowers with cleistogamous flowers inconspicuous; petals absent; calyx tube 5-6 mm long, 1-1.5 mm wide at the base to 2 mm wide at the throat, pilose, lobes 2 mm, chasmogamous flowers white with dark red centers inside the standard; calyx tube 8-11 mm long, 2-3 mm wide at the base to 5-6 mm wide at the throat, sometimes oblique to the pedicel, pubescence uncinate, pilose, the lobes deltoid ovate, 3-4 mm long, 2 mm wide at base, acuminate, sparsely pubescent, the ventral lobes 6-7 mm long; standard 2.5-3 cm long, 19-20 mm wide, moderately strigose, the wings extending beyond the keel ca. 2-3 mm, the blade ca. 12 mm long, 5 mm wide, the claw ca. 11 mm long, the keel falcate, ca. 6 mm across, 3 mm wide, the claw ca. 15 mm long; staminal column ca. 18-19 mm long, free filaments 2-3 mm, incurved, the anthers 1 mm long, 0.4 mm wide; ovary ca. 8 mm long, 0.8 mm wide, with dense white, ap-pressed hairs except near the mid lateral face, the style ca. 14 mm long, curved abruptly 5 mm from tip. Fruit stipitate, brown, weakly convex, ecostate, the uncinate pubescence sparsely strigose to glabrate, 3.5-4 cm long, 8-8.5 mm wide; seeds dark brown, weakly reniform, the base and apex truncate, sticky, 2-2.5 mm long, 3.4 mm wide, 2 mm thick.
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