Volume 8 > Part 2 > Year 2007 > Page 375 > Euphorbiaceae > Macaranga

17. Macaranga peltata (Roxb.) Müll.Arg.wfo-0000232151

in DC., Prodr. 15, 2: 1010. 1866; Pax & K.Hoffm. in Engl., Pflanzenr. IV. 147. vii: 347. 1914; Whitmore, Gard. Bull. Singapore 31: 55. 1978; Philcox in Dassan., Revis, Handb. Fl. Ceylon 11: 170. 1997.— Osyris peltata Roxb., Fl. Ind. ed. 2. 3: 755. 1832.— Mappa ?peltata (Roxb.) Wight, Icon. Pl. Ind. Orient. 3: t. 817. 1844.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Small tree; twigs stout to 1 cm in diam., round, smooth, finely, sometimes sparsely fawn furfuraceous, becoming glabrous. Stipules ovate or oblong, 5–10 by ca 5 mm, apex acute, rusty furfuraceous, thinly leathery, becoming reflexed, soon caducous. Leaves: petiole 11–19 cm long, slender, ca 3 mm in diam., round, slightly striate, weakly furfuraceous, weakly kneed at top; blade ovate, 13–25 by 12–21 cm, thickly papery, base broadly rounded deeply 3–6 cm peltate, with nectaries on upper leaf surface near the basal leaf margin and towards the apex, margin entire, apex acute, sometimes with a narrow 10 mm long acumen, lower surface weakly pubescent with short white tufted hairs, palmately nerved. Staminate inflorescences small racemes, 5–9 by ca 6 cm; bracts inconspicuous, ovate, ca 2 by 1 mm, apex acute, rusty furfuraceous, persistent; bracteoles conspicuous, ovate, to 6 by 5 mm, margin wavy, sometimes shallowly toothed, apex rounded to broadly acute, thick, persistent, erect, both sides densely reddish-brown furfuraceous, larger than flower clusters; flower clusters in tight overlapping groups of ca 4 at branch tips. Staminate flowers in clusters of ca 20, shortly pedicellate; sepals free, pubescent; stamens 3, 4-locular. Pistillate inflorescences as staminate ones except short, ca 5 cm long racemes. Pistillate flowers with vestigeal calyx; ovary strongly granular glandular, with massive lateral papillose stigma. Fruits in groups to 3, unilocular, very rarely bilocular, to 3 mm in diam., thinly woody, granular glandular; pedicel slender, to 13 mm long, furfuraceous; calyx tiny, divided, persistent; stigmas small, subbasal, plate-like, papillose.

Thailand : NORTHERN: Chiang Mai, Phrae.

Distribution : India (type), Sri Lanka.

Ecology : Secondary forests.