Perennial with several, occasionally one, erect, woody, branching stem forming a shrub 2-4 m high with ± rounded, dense leafy crown. Stems terete, finely and softly pubescent with short, white, appressed, curved, or ± straight, patent hairs when young, becoming glabrous, and ± lenticellate with age. Leaves: petiole and rhachis 4.5-7 cm long; stipules linear, acute, 7-8 mm long, ±1 mm wide, sparsely pubescent, deciduous, usually not early caducous; petiole 1.5-3 cm long including basal pulvinus, petiolar gland lacking; rhachis channelled adaxially with a sessile, or sub-sessile, globose or clavate, green or yellowish gland between the lowest pair of leaflets only; leaflets in 4 or 5 pairs, obovate, elliptic or suborbicular, (1.3-)1.7-4 cm long, 0.9-2 cm wide, uppermost pair largest, bases asymmetric, narrowly to broadly cuneate, apices very broadly obtuse or rounded, usually minutely mucronate, margins yellow, sparsely white-pubescent in proximal half of leaflet, becoming glabrous in distal half, adaxial surfaces glabrous, abaxial white-pubescent near leaflet bases especially anticously and along midvein. Inflorescences axillary, numerous at ends of branches, sometimes extending back 40 cm or more, more often forming pseudo-panicles, racemes ± corymbose, 4-10 cm long, 2-10-flowered; peduncles (1.5-)3-5 cm long at flowering, stronger and slightly longer at fruiting; bracts, up to 2 mm wide, resembling stipules; pedicels, at flowering, 2-3 cm long, at fruiting stouter but hardly longer, glabrous. Sepals obtuse, glabrous. Petals obovate or elliptic, 1.8-2 cm long, 1-1.3 cm wide, bright yellow. Stamens 10: 3 staminodal or 2 ±1 reduced, (adaxial) flattened, ± orbicular in face view, margin slightly wavy, 4-4.5 mm long including filament, 7 functional (4 lateral medium, 2 lateral-abaxial large, filaments ±1.9 cm long, central-abaxial medium, filament ±0.8 cm long), dehiscence porose, longitudinal cracks developing down potential line of longitudinal dehiscence in mediumsized and large anthers. Ovaries villous with long curled white hairs with ± stalked glands intermingled; styles ± coiled, ±8 mm long, glabrous; stigmas narrowed, hollowed, glabrous. Pods ± straight to slightly curved distally, shortly stalked, rounded apically, terete, ± inflated, 18-20 cm long, ±1 cm wide, transversely septate within, pendulous, many-seeded, indehiscent or very tardily dehiscent. Seeds laterally compressed, elliptic, ±7 mm long, ±5 mm wide, testa brown, smooth; areoles lacking.
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Small tree or scandent shrub, 2-4 m high; crown densely leafy, glabrous. Leaves up to 80 mm long, bluish green. Leaflets in 4 or 5 pairs, obovate to elliptic, base rounded, asymmetrical, apex rounded to obtuse. Inflorescences of axillary racemes, terminal on branches, exserted above foliage. Flowers bright yellow. Flowering time Apr., May (all year?). Pod stipitate, straight to slightly curved, cylindrical, 180-200 x 8-14 mm, internally septate. Valves glabrous, papery, dark brown.
Leaves with raised, reticulate venation on both surfaces; ovary glabrous to sparsely strigose; anther beaks as wide as or wider than long.
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