Volume 8 > Part 1 > Year 2005 > Page 92 > Euphorbiaceae > Aporosa

10. Aporosa nervosa Hook.f.wfo-0000249289

Fl. Brit. Ind. 5: 350. 1887; Airy Shaw, Kew Bull. 23: 4. 1969; Whitmore, Tree Fl. Malaya 2: 61. 1973; Airy Shaw, Kew Bull. Add. Ser. 4: 39. 1975. Fig. 19. A–C.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Tree, up to 30 m high; young branches (sparsely) puberulous. Stipules narrowly ovate, 7–10 by 3–5 mm, caducous. Leaves: petiole terete, 8–21 mm long, sparsely puberulous, pulvini distinct; blade elliptic, 8.5–21 by 2.5–8 cm, length/width ratio 2.6–3.4, coriaceous, drying greenish grey to greenish blue above, greyish brown beneath, base obtuse to attenuate, basal glands absent, margin slightly undulate to crenulate, marginal glands regular, large, apex acuminate to cuspidate, midrib basally very sparsely puberulous above, sparsely hirsute beneath, disc-like glands absent; venation especially raised beneath, nerves in 6–9 pairs. Inflorescences axillary. Staminate inflorescences 1–3 together, 14–57 by 1.5–2 mm, puberulous; peduncle 2–4 mm long; bracts triangular, 1.2–1.5 mm long; glomerules with 6–10 flowers, spaced at 2–3 mm at base to touching at apex. Staminate flowers 2–3 mm long; pedicel minute; sepals 4, obovate, ridged. 1.2–1.5 mm long; stamens 3 or 4, exserted. 2–3 mm long; anthers 0.3–0.4 mm long; pistillode absent. Pistillate inflorescences 1 or 2 together, 5–9 mm long, (sparsely) puberulous, flowers up to 9, rather densely set along rachis but more densely so apically; bracts triangular, 0.7–0.9 mm long. Pistillate flowers 2–3 mm long; pedicel 0.8–1 mm long; sepals 4, ovate, patent. 0.8–1.2 mm long; ovary 2- or 3(4)-locular, (sparsely) puberulous; stigmas sessile, 0.8–1.2 mm long, bifid to near base. Fruits ellipsoid to globose, not stiped, not beaked, 10–22 by 9–13 mm, sparsely hairy, not fleshy; septae and column glabrous. Seeds 7–9 by 5–6 by 2–3 mm.

Thailand : PENINSULAR: Nakhon Si Thammarat (Yong Falls), Songkhla (Boriphat Falls).

Distribution : Malay Peninsula (type), Sumatra, Java, Borneo.

Ecology : Primary and secondary mixed dipterocarp forests or alluvial forests; flat or undulating land, on hillsides, ridge tops, near swamps, and river banks; on clay or sandy loam or granitic sand, blackish or reddish soil; 20–800 m alt.

Vernacular : Mueat khaeng (เหมือดแขง)(Peninsular).