Lianas. Branchlets dark brown, minutely puberulent when young, minutely lenticellate. Petiole 5-8 mm; leaf blade elliptic to elliptic-oblong, 10-16.5 × 4-6.5 cm, appressed pubescent when young especially abaxially on midvein, glabrescent, midvein abaxially prominent, secondary veins 9-12 on each side of midvein, base narrow, apex apiculate to bluntly acuminate. Inflorescences with 2 fascicles, one apical and another slightly below it on outer side, many flowered; peduncle 1.5-2 cm, stout, sharply curved, appressed bristly. Pedicel 0.8-1.5 cm, rufous hispid. Sepals ovate-triangular, 3-4 mm, outside rufous pubescent, inside glabrous. Petals green to yellow, oblong to oblong-lanceolate, 1.8-2.5 × 0.6-0.7 cm, subequal, base deeply convex; inner petals slightly narrower and more deeply concave than outer petals, connivent over stamens and carpels, outside thinly pubescent but densely gray pubescent on basal concave part, inside glabrous. Stamens oblong-cuneate, ca. 1.5 mm; connectives apically truncate. Carpels 12-21, narrowly oblong to lanceolate-oblong, 1.3-1.5 mm, glabrous; styles oblong to narrowly clavate, 1.3-1.5 mm. Fruit not seen. Fl. May-Aug, fr. Jul-Oct.
Home