Desmos cochinchinensis Lour., Fl. Cochinch. 1: 352. 1790. Unona cochinchinensis (Lour.) DC., Prodr. 1: 91. 1824. Unona desmos Raeusch., Nomencl. ed. 3. 161. 1797; Hook. f. & Thomson in Fl. Brit. India 1: 59. 1872.

Climbers or scandent shrubs; young branches minutely rufous pubescent, glabrous with age. Leaves oblong to elliptic-oblong, rounded at base, acute to slightly obtuse at apex, 12 - 22 x 4 - 8 cm, thinly coriaceous, pubescent beneath and midrib above when young, glabrous with age; lateral nerves 12 - 14 pairs; petioles 6 - 10 mm long, pubescent when young. Flowers ca 5 mm long, fragrant, solitary, extra-axillary, pendulous; pedicels slender, 10 - 15 cm long, glabrous or minutely appressed pubescent; bracts 2, submedian, linear, ca 4 mm long. Sepals 3, free, ovate-lanceolate, acuminate, ca 7 x 3 mm, minutely appressed pubescent outside, glabrous inside. Petals 6 (3 + 3), obovate to ovate-lanceolate, longitudinally 3 - 6-nerved; outer ones 5 - 6 x 2.5 - 3 cm; inner ones shorter and narrower, greenish yellow to yellow, pink at base inside, broadly ovate, slightly appressed pubescent, thickly coriaceous. Stamens numerous, ca 2 mm long; connectives convex on the top. Carpels many, oblong, 2 - 3 mm long, brownish hirsute; stigma clavate with U-shaped groove. Ripe carpels numerous, glabrous, moniliform with 2 - 5 joints, terminal one apiculate; stalks 7 - 18 mm long.

Fl. June - July; Fr. Sept. - Oct.

Distrib. India: Evergreen forests. Assam and Manipur.

Myanmar, Cambodia, Thailand and Malaysia.