Lasianthus ridleyi King & Gamble

104. Lasianthus ridleyi King & Gamble View in CoL

Lasianthus ridleyi King & Gamble (1904) View in CoL 115;Ridl.(1923a) 154; Craib (1934) 216; K.M. Wong (1989) 371; H.Zhu (2001b) 140. — Type: Ridley 3620a (n.v.), Singapore.

Lasianthus reticulatus Blume var. polydasys Miq. (1869) View in CoL 248. — Type: Korthals s.n. (holo L), Sumatra, syn. nov.

Lasianthus singaporensis King & Gamble (1904) View in CoL 117; Ridl. (1923a) 159. — Type: Ridley 9095 (holo SING), Singapore, Bukit Timah .

Lasianthus maingayi Hook.f. var. hirta Ridl. (1923a) 160. — Type: Ridley s.n. (iso K), Peninsular Malaysia, Negri Sembilan.

Shrubs, up to 2 m high; branchlets, terete, c. 2 mm diam, densely and softly tomentose. Leaves: blades elliptic to oblong-elliptic, 15 –20 by 3.5 –7 cm, membranaceous or thinly coriaceous, both sides olivaceous when dry, glabrous above, tomentose beneath, apex caudate-acute to acuminate, base broadly cuneate to subrounded, midrib and nerves flat or slightly prominent above, prominent beneath, nerves 5 –10 pairs, ascending at an angle of over 50°, curved to the margin, nervules slightly distinct above, prominent and distinct beneath, subreticulate; petioles c. 5 mm long, densely tomentose. Stipules inconspicuous or triangular, c. 2 mm long, densely tomentose. Cymes subsessile, tuberculate; bracts numerous, linear with spreading hairs, up to 5 – 6 mm long. Flowers sessile; calyx campanulate, c. 1.5 mm long, glabrous, lobes 4–5, triangular, c. 0.5 mm long, spreading hirsute at tip; corolla 6 –7 mm long, clavate in bud, glabrous outside except for sparsely hairs on the lobes, villous inside. Drupes subglobose, narrowed at base, glabrous, rugose, usually with 4 ridges; pyrenes 4, very verrucose.

Distribution — Thailand, Singapore, Malaysia (Peninsular, Sabah), Indonesia (Sumatra, Kalimantan).

Notes — This species is very similar to L. reticulatus . It was treated as L. reticulatus var. polydasys and L. maingayi var. hirta . It differs from L. reticulatus (= L. maingayi ) by having spreading pubescens on branchlets and leaves beneath and numerous hairy linear bracts. It is better to treat it as a separate species.

Wong (1989) reduced L. singaporensis to a synonym of L. ridleyi . However, L. singaporensis differs from the typical L. ridleyi in having relatively narrow oblong-lanceolate leaves and shorter linear bracts.