Dysoxylum rugulosum King in J. Asiat. Soc. Bengal Pt. 2, Nat. Hist. 64: 49. 1895; Deb & Datta in J. Econ. Tax. Bot. 10: 31. 1987.

Tree, 4 - 7 m high; young branches with striate pale brown bark. Leaves 20 - 30 cm long, paripinnate; rachis shorter than upper pair of leaflets;, leaflets 2 pairs, opposite, oblong-oblanceolate, narrowed at base, shortly and abruptly acuminate at apex, thickly membranous, pale and minutely rugulose when dry; secondary nerves 8 - 14 on each side, faint above, prominent and almost winged beneath; lower pair 8.5 - 12 x 3.8 cm; upper pair 15 - 20 x 5.6 cm; petiolules ca 3 mm long, stout. Racemes supraaxillary, 3 - 4-flowered, puberulous. Flowers ca 5 mm long, shortly pedicellate. Calyx almost flat, 4-cornered, rugulose outside, glabrous inside. Petals 4, elliptic, truncate at base, subacute at apex. much longer than calyx, glabrous inside, puberulous outside. Staminal tube cylindric, shorter than petals, slightly ridged, puberulous outside, glabrous inside; mouth with 8 - 9 broad, shallow, emarginate teeth; anthers elliptic, not exserted. Disk shortly cylindric, slightly exceeding ovary, fleshy, glabrous, 8 - 9-toothed. Ovary hemispheric, ridged, puberulous, tapering into a long puberulous style; stigma discoid with a broad annulus at base, exserted. Fruits pyriform, apiculate, ca 3 x 1.8 cm.

Distrib. India: Mizoram.

Malesia.