Shrubs; branchlets terete, tomentose. Leaves: blades oblong or elliptic-lanceolate, 7 – 11 by 2.5 – 4 cm, subcoriaceous, glabrous above except tomentose midrib, tomentose beneath, apex acute to acuminate, mucronate, base acute, margin recurved, midrib flat above, prominent beneath, nerves flat to slightly depressed above, prominent beneath, 7 – 10 pairs, ascending at an angle of over 45 °, curved to the margin, nervules prominent on both surfaces, parallel; petioles, c. 3 – 5 mm long, tomentose. Stipules linear-subulate, 4 – 5 mm long, tomentose. Cymes axillary, sessile or subsessile; bracts linear, 5 – 6 mm long, singular, tomentose. Flowers fascicular, sessile; calyx obconical, tube c. 2 mm long, hirsute, lobes 5, linear, 3 – 4 mm long, hirsute; corolla tomentose. Drupes globose, 4 – 5 mm diam, with 5 – 6 obtuse ridges, verrucose, crowned by the persistent linear to lanceolate-subulate, 3 – 4 mm long, hirsute calyx lobes; pyrenes 5 – 6.
Sumber: A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae)