Shorea polyandra P.S.Ashton

Yellow meranti (en)

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Very large, buttressed tree. Twig, petiole and leaf beneath persistently purplish rufous lepidote, fading to grey; bud and stipule persistently shortly purplish rufous puberulent. Twig c. 1 mm ø apically, slender, terete, smooth or minutely striated; stipule scars short, horizontal, obscure. Bud to 2 by 1 mm, small, ellipsoid, subacute. Stipule to 5 by 2 mm, lanceolate, subacute, fugaceous. Leaves 8-13 by 3-5 cm, lanceolate, chartaceous, undulate; base cuneate; acumen to 2 cm long, slender; nerves 11-14 pairs, slender, elevated beneath, at 40°-60°; tertiary nerves scalariform, slender, at 90° to the midrib; midrib slender, evident, applanate above, prominent beneath; petiole 14-20 mm long, slender. Panicle to 6 cm long, terminal or axillary, terete, densely dark rufous pubescent; singly branched, branchlets to 1 cm long, bearing to 3 more or less distichous flowers; bracteoles to 4 by 3 mm, elliptic, subacute, rufous pubescent, caducous. Flower bud to 5 by 4 mm, broadly ovoid. Calyx sericeous on parts exposed in bud; lobes suborbicular, subequal. Petals oblong, obtuse, densely pubescent on parts exposed in bud. Stamens 102-107, very many, sub-equal; filament compressed at base, tapering, c. 1/2 length of anther, anther narrowly oblong, c. 4 times as long as broad; appendage to connective filiform, tapering, somewhat shorter than length of anther, densely pubescent. Ovary ovoid, densely pubescent, tapering into a short broadly columnar trifid style; style pubescent except at apex. Fruit pedicel to 1 mm long, short. Calyx sparsely purplish rufous pubescent towards the base, elsewhere glabrescent; 3 longer lobes to 8 by 1.4 cm, spatulate, obtuse or subacute, tapering to 8 mm broad above the to 10 by 8 mm tuberculate saccate thickened base; 2 shorter lobes to 5 by 0.5 cm, linear, acute, similar at base. Nut to 30 by 13 mm, narrowly ovoid, acute, densely rufous pubescent.
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Growth form tree
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Sexuality hermaphrodite
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Environment

Locally abundant on fertile clay rich soils on calcareous shales, igneous and volcanic rocks below 600 m.
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Hardiness (USDA) 10-12

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Cultivation

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Distribution

Shorea polyandra world distribution map, present in Malaysia

Conservation status

Shorea polyandra threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:321410-1
WFO ID wfo-0000499146
COL ID 4X52B
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Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea polyandra