Hopea bilitonensis P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Hopea

Characteristics

Small smooth-barked tree with stilt roots. Leaf buds and parts of petals exposed in bud densely tawny pubescent, young twigs and panicles fugaceously so, otherwise glabrous. Twigs c. 1 mm ø apically, slender, much branched, red-brown, terete, smooth. Leaf buds c. 1 by 1 mm, ovoid, acute; stipules unknown, fugaceous. Leaves 7.5-16 by 3.5-6 cm, ovate-lanceo-late, +-chartaceous, lustrous; base obtuse to subcor-date, subequal; acumen to 2 cm long, attenuate; nerves 6-8 pairs, slender but prominent beneath, applanate above, arched, at 50°-60°; secondaries absent; tertiary nerves remotely subscalariform, evident and distinctly elevated beneath; petiole 6-8 mm long, short. Panicle to 18 cm long, slender, axillary, solitary, lax, pendant; twice branched, branchlets to 4 cm long, bearing to 6 flowers; bracts and bracteoles minute, deltoid, caducous. Flower bud to 3 by 2 mm, lanceolate. Sepals fimbriate; 2 outer deltoid, subacute; 3 inner ovate, subacute. Stamens 15, in 3 unequal verticils, shorter than style at anthesis; filaments somewhat slender, compressed at base, tapering distally and filiform beneath the small subglobose anthers; appendages c. 3.5 times as long as anthers, very long and slender, ± crisped. Ovary small, ovoid, with somewhat longer oblanceolate stylopodium and short terminal style. Fruit pedicel to 2 mm long, stout. 2 longer calyx lobes to 5 by 1.2 cm, broadly spatulate, obtuse, c. 1 mm broad above the to 7 by 4 mm subauriculate centrally thickened base; 3 shorter lobes to 9 by 6 mm, ovate, acuminate, shorter than nut. Nut to 10 by 6 mm, ovoid, prominently slender apiculate.
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Growth form tree
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Foliage retention evergreen
Sexuality hermaphrodite
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Environment

Locally common in lowland forest, once recorded from limestone in N.W. Malaya.
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Hardiness (USDA) 9-12

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Cultivation

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Distribution

Hopea bilitonensis world distribution map, present in Indonesia, India, Sri Lanka, and Malaysia

Conservation status

Hopea bilitonensis threat status: Critically Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320852-1
WFO ID wfo-0000724492
COL ID 3MJCR
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Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Hopea bilitonensis