Shrubs; branchlets terete, c. 3 mm diam, densely tomentose. Leaves: blades oblong-elliptic to oblong-lanceolate, 10 – 15 by 3 – 3.5 cm, coriaceous, glabrous above, tomentose beneath, apex acuminate, base acute or cuneate, midrib and nerves flat or slightly depressed above, prominent beneath, nerves 7 – 8 pairs, ascending at an angle of 40 – 50 °, curved to the margin, nervules obscure above, slightly prominent beneath, parallel; petioles 5 – 8 mm long, densely tomentose. Stipules narrowly triangular, c. 3 mm long, densely tomentose. Cymes pedunculate; peduncles 0.2 – 2 cm long, stout, densely tomentose; bracts linear, 0.5 – 1 cm long, densely tomentose. Flowers sessile; calyx densely long-villose, tube 1 – 2 mm long, lobes 6, linear, up to 12 mm long; corolla tube c. 10 mm long, long-villose outside, lobes 6, ovate-triangular, c. 3 mm long, long-villose outside, floccose inside. Drupes subglobose, c. 8 mm diam, densely tomentose, crowned by persistent linear calyx lobes; pyrenes 6.
Sumber: A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae)