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Shrub to 3 m tall, glabrous throughout, except for strigulose leaflet stalks and ovary. Leaves 5-15 cm long, the petiole 1.5-4 cm long, a fusiform or claviform nectary borne between the lowest and often the more distal pairs of leaflets; leaflets 2-3 pairs, narrowly lanceolate-elliptic, the terminal pair 2-8 cm long x 0.8-2 cm wide, apex acute, base asymmetric. Inflorescences of corymbiform racemes 5-8 cm long, usually terminal on the branches and exserted above the foliage, flowers 5-10 per raceme; sepals obovate, unequal; petals obovate, 0.6-1 cm long; fertile stamens 7, the lowermost abaxial stamen only slightly smaller than the 2 long abaxial stamens, anthers truncately beaked, obliquely so in the 4 shorter median stamens, dehiscent by 2 confluent terminal pores; ovary strigulose, stigma minutely porate. Fruits linear-oblong, cylindrical, 6-12 cm long x 0.6-1 cm in diameter; valves papery, brown, separating in 2 layers, internally septate and pulpy, glabrous; seeds in 1 row, obovate, glossy, lacking an areole.
Shrub, spreading, to 3 m tall, glabrous. Leaves 4-6 cm long including a ribbed petiole 20-35 mm long; stipules acicular, caducous; leaflets in 2-3 pairs spaced 12-20 mm apart, narrowly to broadly lanceolate, 25-50 mm long, 8-12 mm wide, increasing distally, acute; gland 1, between the lowest leaflet pair, erect. Inflorescence of 15-20 flowers, terminal and in upper axils, paniculate; peduncle 20-30 mm long; pedicels 12-18 mm long; bracts caducous. Petals to 15 mm long. Fertile stamens 6 or 7, with 3 adaxial and sometimes 1 abaxial staminodes; fertile filaments distinctly unequal, 4-12 mm long; fertile anthers unequal, 4-7 mm long. Pod cylindric, to 15 cm long, c. 10 mm diam., curved, entire. Seeds dull or lustrous.
Shrub, up to 3 m high. Leaflets glabrous abaxially, lanceolate, 30-60 x 6-15 mm, margins yellow, usually in 3, occasionally in 2, pairs. Ovaries with valves appressed pubescent. Flowers bright yellow and brown-veined.
