Twining vines, high climbing; stems terete, sparsely pubescent. Leaves with the lamina widely lanceolate, elliptic, ovate, occasionally obovate, 6.5-14 cm long, 2.5-8 cm wide, the lateral leaflets smaller, inequilateral, the apices acute, obtuse or abruptly acuminate with the extension 10-15 mm long, the bases round-ed, occasionally slightly cordate, the upper surface shining or dull, glabrous, sparse pubescent below or with a few hairs on the primary veins, with ca. 6 pairs of primary lateral veins; rachis 7-18 mm long, /5/2 the petiolar length, with dense ferruginous pubescence when young, quickly glabrous; stipels setaceous, ca. 1 mm long, usually persistent; stipules linear or lanceolate, sometimes deeply bifurcate or trifurcate, the lobes linear, the middle longest, 1.5-4.0 mm long, not produced, frequently with secondary bracts surrounding the emerging inflores-cence and leaf cluster. Inflorescences terminal or axillary, emerging with the leaves, single, double, occasionally branched, 3-18 cm long; each tubercle with 3-8 flower buds, the tubercles clavate with the heads usually elongate upwards and swollen; primary bract at the base of the tubercle linear lanceolate, ca. 2 mm long, glabrous, caducous; bracteoles ovate to orbicular, ca. 1.8 mm long, semi-persistent; flowers subsessile. Flowers blue violet to deep purple, 10-12 mm long; calyx tube ca. 3 mm long, ferruginous pubescent, the upper lobes entire or emar-ginate, the lobes subequal, 1.5-2 mm long; standard with the lamina obovate, weakly auriculate or not callose, striate, ca. 8 mm long, 6.5 mm wide, glabrous, the claw ca. 2 mm long, the wings oblanceolate or somewhat oblong, auriculate, striate, ca. 6 mm long, 2.5 mm wide, glabrous, the claw ca. 2.5 mm long, the keel petals somewhat oblong to obliquely oblong, ca. 6.5 mm long, 2 mm wide, gla-brous, the claw ca. 2.5 mm long, the upper margin entire, not rostrate; vexillary filament often weakly fused to the staminal sheath, the anthers perfect, mono-morphic; ovary ca. 6 mm long, short stipitate, densely villous with rigid, white hairs interspersed with dark brown hairs, ca. 5-ovulate, the style upcurved or ascending, glabrous for ca. 2 mm, shortly exserted through the keel petals. Fruits elliptic, flat, dehiscent, sessile, 5.5-8.5 cm long, 2.1-2.4 cm wide, 2.5-5 mm thick, exocarp of young fruits with dark brown pubescence, finally glabrous, the upper suture slightly raised with shallow parallel ribs ca. 1 mm to either side, the lower margin somewhat swollen; seeds 2-4, flat, oval, brownish, smooth, shining, ca. 13 mm long, 10 mm wide, 3 mm thick, surrounded by papery, red, packing tissue, the hilum oblong, 2.5-3.0 mm long.
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