Volume 7 > Part 3 > Year 2001 > Page 638 > Sterculiaceae > Sterculia

8. Sterculia macrophylla Vent.wfo-0000491919

Jard. Malm. 2: t. 91. 1804; Mast. in Fl. Brit. Ind. 1: 356. 1874; Ridl., Fl. Malay Penins. 1: 268. 1922; Tantra in Pengum. Lemba. Penel. Hutan [Bogor): 68. 1976; Phengklai in Fl. Peat Swamp Narathiwat.: 240. 1991. Fig. 112.

Accepted Name : This is currently accepted.

Description : Deciduous tree, up to 30 m high; always with straight bole; buttresses up to 3 m high; bark smooth, greyish to greyish-brown; twigs stout, first rusty stellate hairy then glabrescent, with prominently raised large leaf scars. Stipules lanceolate, glabrous, caducous. Leaves broadly ovate or heart-shaped, chartaceous to sub-coriaceous, glabrescent, but hairy along nerves on upper surface, densely hairy on lower surface; 16–35 x 13–30 cm, apex blunt or broadly acute, base cordate, 3–(5)-nerved from base, secondary nerves 6–10 pairs, straight and gradually curved near margin, all nerves and scalariform veins prominent on lower surface and depressed on upper surface. Petiole 10–16 cm long, densely tomentose, straight and smooth. Inflorescences terminal and axillary, paniculate, much-branched, erect, 20–40 cm long; branches 2–8 cm long, hairy; bracts lanceolate, caducous. Flower buds globose; pedicels 2–3 mm long. Calyx obconical or campanulate; lobes erect or spreading, as long as calyx-tube, hairy on both surfaces. Male flowers with (5–)10 stamens; anthers sessile; staminodes 10. Female flowers with 5 free carpels, each globose, pubescent, with 2–17 ovules; styles cohering, sparsely hairy; stigmas 5 curved lobes. Follicles with 3–5, globose or ellipsoid, 5–6 x 4.5–5 cm, leathery woody; covered with red or dark brown tomentum. Seeds 1–9, ellipsoid, 12–20 by 8–12 mm, black.

Thailand : SOUTH-WESTERN: Kanchanaburi; PENINSULAR: Narathiwat.

Distribution : Malay Peninsula, Indonesia (type), the Philippines.

Ecology : In swamp forests, 0–20 m alt. Flowering and fruiting: July–March.

Vernacular : Klet raet (เกล็ดแรด)(Southwestern); po phat bok (ปอพัดโบก)(Peninsular).