Volume 14 > Part 1 > Year 2018 > Page 27 > Cornaceae > Alangium

9. Alangium ridleyi Kingwfo-0000937538

J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 71(1): 78. 1902; Wangerin in Engler, Pflanzenr. 41, IV. 220b: 12. 1910; Ridl., Fl. Penins. Malaysia 1: 893, f. 75. 1922; Bloemb., Bull. Jard. Bot. Buitenzorg, sér. 3, 16: 215; 1939; Wijedasa et al., Gard. Bull. Singapore 66(2): 233. 2014; de Wilde & Duyfjes, Blumea 62: 45, f. 7. 2017. Fig. 6. Plate IV: A.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Tree, 15–30 m tall; twigs 5–10 mm diam., with ca 0.1 mm long hairs, glabrescent; often with lenticels; thorns absent. Leaves: petiole stout, ca 2 by 0.4–0.5 cm; lamina early glabrescent, broadly elliptic, or obovate, or oblong, 20–25 by (6–)10–13 cm, base shortcuneate or rounded, symmetric, apex short acute-acuminate; veins all pinnate, 9–15(–20) on each side; intercostal venation thin, reticulate-scalariform. Inflorescences minutely hairy, as long as or rather shorter than the petioles, sessile or with 0.5(–1) cm long peduncle, fewbranched, with up to 20 flowers. Flowers: pedicel 2–6 mm long; corolla in bud 10–15 mm long, apex usually broadly rounded; ovary and calyx ca 5 mm long; limb ca 1 mm long, 5–7 mm wide, margin straight or hardly dentate; petals 6, minutely hairy outside glabrous inside, 10–15 mm long; stamens 6, filaments short and wide, concave, ca 5 mm long, hairy mainly at apex, anthers ca 10 mm long, connective glabrous; style ± hairy, stigma conical, longer than broad. Fruit 1 or 2 per infructescence, ellipsoid, glabrescent, 3.5(–4) cm long, deeply (10–)12-ridged and grooved.

Thailand : PENINSULAR: Pattani, Narathiwat.

Distribution : Sumatra, Peninsular Malaysia, Singapore (type), Borneo.

Ecology : Scattered in evergreen forests, 160 m alt. Flowering: March and April; fruit not known from Thailand.