Lasianthus crassinervis Ridl.

33. Lasianthus crassinervis Ridl. View in CoL

Lasianthus crassinervis Ridl. (1910) 59. —

Type: Ridley 14487 (holo SING; iso K), Peninsular Malaysia, Ulu Temengoh .

Lasianthus retosus auct. non Wight: K.M. Wong (1989) 371.

Shrubs, c. 1 m high; branchlets terete, 2 – 3 mm diam, densely brown-tomentose. Leaves: blades oblong, 9–19 by 3–4 cm, subcoriaceous, glabrous above, tomentose beneath, apex cuspidate, base rounded to subcordate, oblique, margin reflexed, nerves 10–13 pairs, depressed above, prominent beneath, ascending at an angle of c. 50°, curved to the margin, nervules slightly obscure above, distinct beneath, subparallel; petioles c. 3 mm long, densely tomentose. Stipules triangular, c. 3 by 3 mm, densely tomentose. Cymes sessile; bracts numerous, outer pairs leaf-like, ovate, up to 1 cm long, inner ones smaller, lanceolate to linear, all of them densely tomentose. Flowers sessile; calyx and corolla not seen. Drupes globose, glabrous, 3–4 mm diam, verrucose, crowned by small triangular calyx lobes which are c. 0.5 mm long; pyrenes 4–5, verrucose on the abaxial face.

Distribution — Peninsular Malaysia.

Notes — This species has nerves which are conspicuously depressed above and elevated beneath, subparallel nervules which are faint above and conspicuous beneath, ovate to lanceolate bracts, as well as glabrous and verrucose drupes.

Ridley (1923a) reduced it to L. retosus that he sank to a variety as L. pilosus var. retosus . However, it conspicuously differs from L. pilosus (= L. retosus ) by having leaves with strongly depressed nerves above, bracts which are obovate to lanceolate, 0.8 – 1.2 cm long and glabrous drupes. Lasianthus pilosus has leaves with nerves slightly depressed above, linear bracts, and pilose drupes with smooth surface.