Dysoxylum acutangulum
Content
Description
Tree to 47 m tall; bole to 140 cm diam., fluted and clear to 18 m; buttresses to 3 m tall and 2 m out.
Bark smooth, yellowish, with conspicuous lenticels, becoming irregularly cracked and shedding large scales; inner bark yellowish or orangish fawn, somewhat speckled and with groups of conspicuously thickened cells; wood orange-brown, hard.
Leaves 15–30(–40) cm, 2–6(–7)-jugate, paripinnate with minute apical spike or its scar, glabrous to minutely puberulous, ± decussate; petiole 8–11 cm long, 3–4 mm diam., adaxially grooved and angled when dried, base somewhat swollen; rachis grooved and angled when dried.
Petals 4, c. 12–13 mm long, oblong, ± puberulous on both sides, yellow or creamy yellow, apices acute.
Staminal tube sometimes sparsely pubescent without, glabrous within, margin crenulate; anthers 8(–10), c. 1 mm long, ovate to elliptic, weakly exserted.
Ovary densely pubescent (3- or) 4-locular, each locule with 2 collateral ovules; style pubescent in proximal half; stylehead subdiscoid.
Capsule 5–8 cm diam., subglobose to pyriform, (3- or) 4-valved, glabrous, orange; pericarp to 1 cm thick, heavily veined when old, latex white.
Seeds (3) 4, sometimes some aborted, c. 2 cm long, ellipsoid, black with small orange arilloid hilum on one side; cotyledons green.
Citation
Kosterm. 1969 – In: Reinwardtia: 435.
Mabb. 1989: p. 240. – In: Tree Fl. Malaya: f. 6B.
K. Heyne 1950: Nutt. Pl. Indon., ed. 3: 892
Koord. 1913 – In: Atlas: t. 169
Burkill 1935: Dict. Econ. Prod. Malay Penins.: 884
Ridley – In: Fl. Malay Penins.
Miq. 1868 – In: Ann. Mus. Bot. Lugd.-Bat.: 26
C.DC. 1878 – In: DC., Monogr. Phan. 1: 525
Valeton 1897 – In: l.c. Bogor.: t. 11
King 1895 – In: J. As. Soc. Beng.: 41
Harms 1942 – In: Bot. Jahrb.: 199
Kosterm. 1969 – In: Reinwardtia: 435