High climbing, woody vine. Stems terete, tomentose; cross section with a single vascular cylinder. Leaves pinnately 5-foliolate; petiole and rachis terete, tomentose; petioles 2.5-5.5 cm long; rachis 1.8-2.5 cm long; petiolules 2-3 mm long, tomentose; leaflets chartaceous, abaxial surface ferruginous or flavo tomentose, elliptic to lanceolate, 3.5-8(12.5) × 1.5-5.2 cm, the base obtuse to sub-rounded, the apex obtusely acuminate, mucronate, the margins repando dentate; tertiary veins sub-clathrate to reticulate. Thyrses axillary, racemiform, 7-20 cm long, with stout, tomentose axes; cincinni sessile, few-flowered. Calyx abaxially ferruginous-pubescent, with 4 sepals, outer sepals ca. 1 mm long, inner sepals ca. 3 mm long. Capsule 3-winged, slightly woody, orange-red when mature, ferruginous tomentose, stipitate, the locule ellipsoid to pyriform, 2.5-5.5 cm long, the wings of similar size, projecting beyond the apex of the locule, decurrent toward the stipe, 0.7-1 cm wide, crenate on margins, the endocarp glabrous. Seed solitary, ca. 1.5 cm long, ellipsoid, dark brown, with a sarcotesta on lower ⅔.
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