Lasianthus flavinervius Ridl.

47. Lasianthus flavinervius Ridl. View in CoL

Lasianthus flavinervius Ridl.(1915) 154; (1923a) 162. — Type: Ridley 16121 (holo SING; iso K), Peninsular Malaysia, Gunong Tahan , Pahang .

Shrubs; branchlets robust, terete, 3–4 mm diam, compressed and slightly sulcate in the youngest part, densely appressed-pubescent. Leaves: blades oblong to oblong-elliptic, 10–15 by 3 –5 cm, coriaceous, glabrous above, appressed-pubescent on venation beneath, apex acuminate to cuspidate-acuminate, base acute or cuneate; midrib depressed above, strongly prominent beneath, nerves 6 – 8 pairs, flat above, strongly prominent beneath, ascending at an angle of 50–60°, curved to the margin, nervules slightly prominent above, conspicuously prominent beneath, subparallel; petioles c. 1 cm long, densely appressed-pubescent. Stipules broadly triangular, c. 1.5 mm long, appressed-pubescent. Cymes sessile; bracts absent. Flowers sessile; calyx tubular-campanulate, 3–4 mm long, appressed-pubescent outside, lobes 5, ovate-triangular, curved inward, c. 1–1.5 mm long, hirsute inside; corolla hirsute outside. Drupes campanulate, c. 5 mm long, crowned by 5 calyx lobes, pubescent, conspicuously 4–5-ridged; pyrenes 4–5.

Distribution — Peninsular Malaysia, Indonesia (Sumatra).

Notes — The species is very close to L. chinensis . It differs from the latter by having 6 –8 pairs of nerves and somewhere subparallel nervules, midrib depressed above and strongly prominent beneath, nerves strongly prominent beneath.

Wong (1989) sank this species to L. perakensis . However, it differs from the latter by having midrib and nerves strongly prominent beneath, calyx tubular-campanulate with 5 ovate-triangular lobes, drupes campanulate crowned by 5 conspicuous calyx lobes, drupes with 4–5 ridges. Lasianthus perakensis has midrib and nerves not strongly prominent beneath, calyx limb slightly trumpet-shaped with 5 indistinct obtuse lobes, drupes hemispheric with 10 obtuse ridges and crowned by obtuse calyx lobes.