e-Flora of Thailand
Volume 8 > Part 1 > Year 2005 > Page 97 > Euphorbiaceae > Aporosa
13. Aporosa penangensis (Ridl.) Airy Shawwfo-0000249434
Kew Bull. 23: 3. 1969; Whitmore, Tree Fl. Malaya 2: 61. 1973.— Aporosa maingayi var. penangensis Ridl., Fl. Malay Penins. 3: 242. 1924. Fig. 16: H; Plate II: 3.
Accepted Name : This is currently accepted.
Description : Tree, up to 21 m high; young branches (sparsely) hirsute. Stipules narrowly ovate, 5–11 by 1.5–4 mm, caducous. Leaves: petiole reniform, 6–13 mm long, (sparsely) hirsute, pulvini distinct; blade elliptic, 7–20 by 2–7 cm, length/width ratio 2.9–3.5, papery, drying greyish (to blackish brown) above, light brownish beneath, base obtuse to slightly attenuate, basal glands absent, margin slightly undulate to crenulate, marginal glands indistinct, apex acuminate to cuspidate, midrib at base sparsely hirsute above, venation sparsely hirsute beneath, disc-like glands absent; venation especially raised beneath, nerves in 7–9 pairs. Inflorescences axillary. Staminate inflorescences 1–4 together, 9–18 by 0. –0.9 mm, tomentose; peduncle 0.5–1.5 mm long; bracts triangular, 0.8–1 mm long; glomerules with less than 10 flowers, spaced at 1–2 mm at base of rachis to touching at apex. Staminate flowers 0.5–1 mm long; pedicel minute; sepals 4, narrowly obovate, ridged, 1–1.5 mm long; stamens 3, slightly exserted, 0.6–0.8 mm long; anthers 0.2–0.3 mm long; pistillode minute. Pistillate inflorescences 1–4 together, 5–11 mm long, tomentose; flowers up to 9, rather densely set along the rachis; bracts triangular, 0.8–1.2 mm long. Pistillate flowers 2.5–3 mm long; pedicel minute, tomentose; sepals 4, ovate, subequal, patent, 1-1.5 mm long; ovary 2-locular, (sparsely) sericeous; stigmas 2, sessile, 1–1.2 mm long, bifid to near base. Fruits ellipsoid, young ones slightly stiped, not beaked, 10–15 by 6–10 mm, sparsely puberulous, not fleshy, yellowish to light brown; septae and column glabrous. Seeds 7–10 by 5–6 by 3–4 mm; aril orange.
Thailand : PENINSULAR: Ranong (Khao Tehin), Phatthalung (Khao Pu-Khao Ya NP, Tamote Falls NP), Trang (Khao Chong), Songkhla (Boripat Falls).
Distribution : Malay Peninsula (type).
Ecology : Primary or logged, evergreen forests, in lowland, on hillsides, gentle slopes, ridges, or flat land, near rivers, or along roads; on sandstone, granitic bedrock; 50–780 m alt.
Vernacular : Takhop nok (ตะขบนก)(Peninsular).