Volume 8 > Part 1 > Year 2005 > Page 98 > Euphorbiaceae > Aporosa

15. Aporosa serrata Gagnep.wfo-0000249579

Bull. Soc. Bot. France 70: 234. 1923; in Lecomte, Fl. Indo-Chine 5: 557. 1927. Fig. 20.

Accepted Name : This is currently accepted.

Description : Shrub to tree, up to 12 m high, mainly hirsute. Stipules ovate, 5–7 by 3–4 mm, caducous. Leaves: petiole 9–17 by 1.5–2.5 mm, terete, pulvini rather indistinct; blade elliptic, 9–19 by 4–8.5 cm, length/width ratio 2.2–2.5, coriaceous, drying mainly brownish to also somewhat greenish above, base obtuse to cuneate, basal glands present, hairy; margin serrate to dentate, flat, marginal glands in teeth hairy; apex acuminate, hairy on venation above, densely hirsute on venation underneath, disc-like glands few, within marginal arches, indistinct; venation bullate, nerves in 8–9 pairs. Inflorescences axillary. Staminate inflorescences 2–5 together, 9–18 mm long, hirsute; peduncle absent; bracts triangular, 0.8–1.2 mm long; glomerules variably distinct, with 6–12 densely set flowers, spaced at 0–0.1 mm along rachis. Staminate flowers 0.8–1.2 mm long, yellow; pedicel minute; sepals 4 or 5, obovate, 0.5–0.8 mm long, almost free; stamens 2 (or 4), 0.5–1 mm long, slightly exserted; anthers 0.3–0.4 mm long; pistillode minute. Pistillate inflorescences 1–3 together, 2–4 mm long, hirsute; flowers up to 7, densely set along rachis; bracts triangular, 0.8–1 mm long. Pistillate flowers 2–3.5 mm long, sessile, yellow; sepals 4 (or 5), ovate, 0.8–1 mm long; ovary 2-locular, hirsute; stigmas 0.5–1 mm long, almost completely divided. Fruits ellipsoid, not stiped, not beaked, 8–9 by 5.5–6 mm, drying dark brown, subhirsute, not fleshy; septae and column hairy. Seeds not seen.

Thailand : NORTHERN: Phitsanulok (Ban Maeo, Thung Salang Luang); NORTH EASTERN: Phetchabun (Lom Sak Kao), Loei (Chiang Khan, Wang Sapung).

Distribution : Laos, Cambodia (type), Peninsular Malaysia.

Ecology : Evergreen or mixed deciduous forests, evergreen scrub, often in moist areas, 200–300 m alt.

Vernacular : Mueat ton (เหมือดต้น)(Northeastern).

Notes: See note under Aporosa ficifolia.