Vines woody. Branches shallowly 6-grooved, glabrous. Leaves 2-pinnate, glabrous; petiole ca. 7 cm; leaflet blades lanceolate, narrowly ovate, or narrowly lanceolate, 1.5--3 × 0.3--0.8 cm, leathery, undivided or 3-lobed or parted, base broadly cuneate to cuneate, margin usually entire or sometimes 1-denticulate; midvein abaxially ± prominent; central lobe larger, linear-lanceolate, 1.5--2.6 × 0.2--0.4 cm; lateral lobes narrowly ovate, 3--10 mm. Flowers solitary, terminal, ca. 4 cm in diam. Pedicel 14--20 cm, glabrous. Sepals 4, yellow, ascending, oblong, 2.3--2.6 × 0.7--0.9 cm, abaxially glabrous except for velutinous margin, adaxially glabrous, apex acute and abaxially with a ca. 2.5 mm projection. Stamens 8--9 mm; filaments pubescent; anthers oblong, ca. 2 mm, glabrous, apex minutely apiculate. Ovaries pubescent. Style ca. 1 cm, densely villous. Fl. Aug--Sep.
Home