Shorea slootenii P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Twig, panicle, leaf bud, stipule outside (pubescent within), petiole and leaf beneath densely persistently scabrid pale fulvous tufted tomentose, the tufts short, hard and knob-like; midrib above shortly pubescent. Twig to 5 by 3 0 apically, stout, compressed and ribbed at first, later terete, verrucose owing to the persistent bases of the hair-tufts; stipule scars to 3 mm long, 0.5 mm thick at base at first, long cuneate, slightly ascending. Bud 6-10 by 5-8 mm, broadly ovoid, slightly compressed, obtuse. Stipule to 25 by 8 mm, oblong, obtuse. Leaves 11-22 by 4-7 cm, broadly oblong, coriaceous, deeply cupped; base obtuse; acumen to 1.5 cm long; nerves (25-)27-34 pairs, dense, depressed above, prominent beneath, arched at margin at 50°-60°; tertiary nerves scalariform, prominent beneath, slightly diagonal to nerves or at 90°; midrib prominently terete beneath, depressed above; petiole 1.7-2.3 cm long, stout. Panicle to 18 cm long, terminal or axillary, stout, brittle, +-compressed; singly or doubly regularly branched, branchlets short, bearing to 4 flowers; bracteoles to 3 by 2 mm, ovate to deltoid, obtuse, densely yellowish brown pubescent outside, glabrous within, caducous. Flower bud to 12 by 7 mm, ovoid to ellipsoid, obtuse. Calyx shortly densely tawny pubescent outside, glabrous within; 3 outer lobes ovate acuminate, longer than the 2 acute inner lobes. Petals pale yellow, lanceolate, subacute, densely shortly tawny pubescent on parts exposed in bud. Stamens 15, the 5 inner reaching the base of the style, about twice as long as the other 10, the latter of two different heights; filaments tapering gradually, slightly twisted in bud; anthers globose; appendage to connective shorter than anther, reflexed on 5 inner stamens; twice as long as anthers, hardly reflexed, on 10 outer stamens. Ovary and stylopodium narrowly ovoid to lanceolate, sparsely setose in distal half, surmounted by a broadly filiform style almost as long as the ovary, glabrous. Fruit calyx lustrous, puberulent, more densely so towards the base; 3 longer lobes to 17 by 1.8 cm, oblong, obtuse, hardly tapering towards base; base with an ovoid to 2 by 1.2 cm, saccate thickened central area adpressed to nut, the lobes continuing laterally as to 1 cm broad auricles, taperingabruptly at pedicel; 2 shorter lobes 5.5 by 0.7 cm, unequal, linear, similarly expanded and auriculate at base. Nut to 3.5 by 1.3 cm, ovoid, densely shortly pale brown to buffpubescent; style remnant to 4 mm long, tapering, acute.
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Growth form tree
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Sexuality hermaphrodite
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Environment

Local, sandy clay soils on hills near the present or Pleistocene coastline, to 400 m.
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Hardiness (USDA) 10-12

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Cultivation

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Distribution

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

Conservation status

Shorea slootenii threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:321449-1
WFO ID wfo-0000499393
COL ID 6YLLZ
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea slootenii