Lasianthus acutatus Miq.

2. Lasianthus acutatus Miq. View in CoL

Lasianthus acutatus Miq. (1861) 549. — Type: Teysmann s.n., HB4011 (holo U), Sumatra, Moeara Enim, Palembang .

Shrubs; branchlets terete, spreading hirsute, brown. Leaves: blades oblong-lanceolate, 12–15 by 3–4 cm, subcoriaceous, spreading hirsute hairs on both surfaces, denser beneath and no midrib, apex acute to shortly caudate, base subrounded and oblique, midrib and nerves slightly depressed above, prominent beneath, nerves ascending at an angle of c. 50°, curved to the margin, 10–12 pairs, nervules obscure above, distinct beneath, subparallel; petioles c. 5 mm long, densely spreading hirsute. Stipules triangular-lanceolate to lanceolate, 4–5 mm long, spreading hirsute. Cymes sessile; bracts absent. Flowers sessile. Drupes crowned by 5 lanceolate calyx lobes, hirsute; pyrenes 5.

Distribution — Endemic to Sumatra.

Note — Miquel (1869) sank this species to L. mucronulatus . However, it differs from L. mucronulatus in having spreading stiff hairs on branches, leaves and stipules, and triangular-lanceolate to lanceolate stipules which are 4–5 mm long. Lasianthus mucronulatus has appressed-pubescence on branches, leaf nerves beneath and stipules, and small triangular stipules. Lasianthus acutatus differs from L. stercorarius in having spreading stiff hairs on branches, leaves and stipules too, and triangular-lanceolate to lanceolate stipules without a swollen base. Lasianthus acutatus is probably a rare species, and is known only from the type specimen.

5 mm