Shorea acuta P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Large tree. Young twig, panicle, leaf bud, stipule (both surfaces), petiole, nervation beneath and midrib above evenly persistently shortly pale brown puberulent, glabrescent on nervation and midrib. Twig to 4 mm ø, slightly compressed at first, becoming terete, glabrous, smooth; stipule scars initially to 3 mm long, to 1 mm thick, cuneate, horizontal. Bud 6-10 by 4-6 mm, ovoid, subacute. Stipule to 12 by 5 mm, oblong, obtuse. Leaves 14-26 by 6.5-12 cm, elliptic, thickly coriaceous; base obtuse, sometimes broadly cuneate; acumen to 2 cm long, ± narrowly deltoid; nerves 10-13 pairs, prominent beneath, curved, at 45°-55° along the midrib, to 90° at the base; tertiary nerves slender, sinuate, densely scalariform, diagonal to nerves; midrib prominent and terete beneath, narrowly slightly depressed above; petiole 1.5-2 cm long, stout. Panicle to 8 cm long, terminal or axillary, compressed; singly or doubly branched at 2 cm intervals, branchlets to 6 cm long, bearing to 9 distichous flowers; bracteoles to 3.5 by 2.5 mm, elliptic, obtuse, shortly yellowish brown puberulent outside, glabrous within, caducous. Flower bud to 9 by 4 mm, narrowly ellipsoid, obtuse. Calyx shortly densely yellowish buff pubescent outside, glabrous within; lobes subequal, ovate, subacute. Corolla dark crimson, pubescent on parts exposed in bud; petals linear, subacute. Stamens 15, of 3 lengths, the longest reaching just above the ovary, filaments tapering gradually; anthers subglobose; appendage to connective short, becoming reflexed. Ovary and stylopodium narrowly conical to ovoid, long tomentose towards the apex, shortly so at base; style c. 1/3 length of ovary and stylopodium filiform, glabrous. Fruit calyx shortly sparsely glabrescent; 3 longer lobes to 15 by 2.8 cm, spatulate, obtuse, to 1.5 cm broad above the base; base to 18 mm broad, with to 8 by 7 mm ovate saccate thickened centre and 2 lateral auricles, abruptly tapering to the pedicel; 2 shorter lobes to 8 by 0.7 cm, linear, unequal, similar at base. Nut to 3 by 2 cm, ovoid, shortly evenly densely pale fulvous to buff pubescent; style remnant short, acute.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Mature height (meter) 0.15 - 1.29
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Photosynthetic pathway c3

Environment

Locally common below 400 m, on deep sandy soils in mixed Dipterocarp forest.
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Hardiness (USDA) 10-12

Usage

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Edible -
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Cultivation

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Distribution

Shorea acuta world distribution map, present in Brunei Darussalam and Malaysia

Conservation status

Shorea acuta threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:321187-1
WFO ID wfo-0000500396
COL ID 4X4TL
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea acuta