Lasianthus vulcanicus Ridl.

130. Lasianthus vulcanicus Ridl. View in CoL

Lasianthus vulcanicus Ridl. (1923b) 71. — Type: Ridley s.n. (holo K), Sumatra, Sibavak volcano.

Treelets, up to 5 m high; branchlets terete, c. 1.5 mm diam, glabrous or sparsely pubescent hairs on the youngest part. Leaves: blades ovate, ovate-elliptic or ovate-lanceolate, 5–10 by 1– 3 cm, coriaceous, glabrous on both surfaces, apex caudate, base acute, rarely acuminate, midrib, nerves and nervules distinct and prominent on both surfaces, nerves 5 –7 pairs, usually ascending at an angle of over 60°, curved to the margin, nervules densely anastomosing, subparallel; petioles 4–5 mm long, glabrous or sparsely pubescent. Stipules triangular, 1.5– 3 mm long, with a swollen base, glabrous or sparsely pubescent. Cymes sessile, bracts absent. Flowers sessile; calyx tube obconic, 0.8 –1 mm long, glabrous, limb cupular, c. 1 mm long, minutely 5-toothed; corolla short, 3–4 mm long, glabrous outside. Drupes obconic-globose, 3–4 mm diam, glabrous; pyrenes 4–5.

Distribution — Malaysia (Sabah), Indonesia (Sumatra, Java).

Note — This species is quite close to L. stercorarius , but differs from the latter by having glabrous branchlets and leaves, leaves with caudate apex, nervules distinct on both surfaces, densely anastomosing, parallel, relatively short petioles, stipules relatively small, calyx with a shortly cupular limb and drupes with 4–5 pyrenes.