Lasianthus pilosus var. pilosus

Zhu, H., Roos, M. C. & Ridsdale, C. E., 2012, A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae), Blumea 57 (1), pp. 1-102 : 75

a. var. pilosus

Lasianthus pilosus Wight (1846) 506; Hook.f. (1880) 182; King & Gamble (1904) 115; Ridl. (1923a) 157; K.M. Wong (1989) 370; H. Zhu (2001b) 139. —

Type: Kew Dist. 869 ( Griffith s.n.) ( holo K), Peninsular Malaysia .

Lasianthus retosus Wight (1846) 506; Hook.f. (1880) 181. — Lasianthus pilosus Wight var. retosus (Wight) Ridl. (1923a) 157. — Type: Kew Dist. 2918 ( Griffith s.n.) (holo K), Peninsular Malaysia, Mt Ophir.

Lasianthus pilosus Wight var. glabra King & Gamble (1904) 115. — Type: Ridley 7424 (n.v.), Peninsular Malaysia, Selangor.

Lasianthus robustus King & Gamble (1904) 123; Ridl.(1923a) 165. — Type: Hervey s.n. ( Ridley s.n. in protologue) (holo SING), Peninsular Malaysia.

Shrubs or treelets, up to 3 m high; branchlets terete, c. 2 mm diam, densely spreading pilose. Leaves: blades oblong, elliptic-oblong or oblong-lanceolate, 8 –17 by 3.5 – 6 cm, chartaceous to subcoriaceous, pilose both surfaces, denser on midrib above and midrib and nerves beneath, apex caudate-acuminate, base rounded to slightly subcordate, asymmetric, nerves slender, flat or slightly depressed above, prominent beneath, 9 –15 pairs, nervules obscure above, distinct beneath, reticulate; petioles 3 – 5 mm long, densely pilose. Stipules triangular-lanceolate, acute, densely pilose, up to 3 mm long. Cymes sessile; bracts small, filiform, 4–5 mm long, pilose. Flowers sessile; calyx dense pilose, tubular, up to 8 mm long, lobes 5–7, lanceolate to linear, up to 5 mm long; corolla tubular, up to 15 mm long, pilose outside, lobes 5–7, linear-lanceolate, 3 mm long. Drupes subglobose, sparsely pilose or glabrous crowned by long hairy calyx limbs with long lobes; pyrenes 5 –7, very hard.

Distribution — S Thailand, Malaysia (Peninsular, Sarawak).