Liana, giant and woody, or spreading shrub. Leaves with 6-13 leaflets, these oblong-lanceolate, ovate, elliptic or oblong, 1.5-7.5 cm. long, 0.7-2.7 cm. wide, the acumen narrow and falcate, the costa plane or immersed above, the main veins 15-20, the blade thinly coriaceous, lustrous and dark-green above, usually sparsely pilose on the costa and margins; petioles 2-3 cm. long; rachises 5-5.8 cm. long. Panicles compressed, axillary, up to 5 cm. long, the shorter branches 3-7 per axil, puberulent and rough with persistent bracts, the latter rotund, up to 1 mm. long, densely puberulent; bracteoles subreniform, about 1.5 mm. long, puberulent. Flowers 5-20 per branch, distichous, the hypanthium shallow, 3-3.5 mm. long, densely puberulent, the teeth (except for the carinal tooth) evanescent; vexillum orbicular-oblong, about 8 mm. long, vaguely auriculate, appressed-sericeous, the claw about 6 mm. long; wing petals narrowly falcate, about 8 mm. long, densely aurous-villose on the outside; carinal petals subrotund, about 8.5 mm. long, aurous-villose; stamens monadelphous, the filaments about 1\2 the length of the sheath, villose (at least the median), the anthers 1-1.3 mm. long; ovary stipitate for about 2.5 mm., densely aurous-villose, the styles subulate, about 2 mm. long, pubescent toward the base. Fruits stipitate for about 0.7 cm., the seminiferous area usually turgid, up to 2 cm. long, up to 0.9 cm. wide, the wing cultriform, up to 4.5 cm. long, up to 2 cm. wide, reticulate, the veinlets prominulous, minutely aurous-puberulent, often powdery in appearance, the carinal margin about 1.5 mm. wide.
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