Hopea pentanervia Symington ex G.H.S.Wood

Species

Angiosperms > Malvales > Dipterocarpaceae > Hopea

Characteristics

Medium-sized, flaky-barked buttressed tree. Young parts puberulent, glabrescent. Twig to 1.5 mm ø apically, terete, much branched, smooth. Bud to 1.5 mm long, small. Stipule to 2 mm long, linear, fugaceous. Leaves 5-10 by 3.2-5 cm ovate, coriaceous; base obtuse or broadly cuneate; acumen tapering, to 1.5 cm long, narrow, margin slightly revolute; nerves c. 5 pairs, prominent beneath, slender, at 45°-55° but strongly curved, with small glabrous pore-like domatia; tertiary nerves slender, distinct, densely scalariform, at 90° to midrib; midrib slender, raised beneath, ± applanate above; petiole 6-11 mm long. Panicle to 8 cm long, terminal or to 2-axillary, terete, lax; regularly singly or doubly branched, branchlets to 1.5 cm long, bearing to 6 secund flowers; bracteoles small, narrowly deltoid, glabrous, caducous. Flower bud small, ellipsoid, on c. 1.5 mm long pedicel. Calyx glabrous but for fimbriate margin; 2 outer lobes oblong, acute; 3 inner lobes short, ovate, acuminate. Petals narrowly lanceolate, shortly pubescent on parts exposed in bud. Stamens 15, small, well spaced round the ovary; filaments broad at base, tapering abruptly and filiform distally; anthers subglobose; appendage to connective c. 3 times length of anthers, very slender. Ovary and stylopodium cylindrical, truncate, glabrous; style short, abrupt, slender. Fruit calyx glabrous; 2 longer lobes to 5 by 1.2 cm, spatulate, chartaceous, obtuse, to 3 mm broad above the to 3 by 3 mm small ovate saccate somewhat thickened base; 3 shorter lobes to 4 by 3 mm, ovate, acute, saccate. Nut to 4 by 3.5 mm, ovate, glabrous; style remnant short.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
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Photosynthetic pathway c3

Environment

Mixed peat-swamp forests. Mixed peat swamp forest over sand, podsols on cuestas. plateaux and terraces, near present or Pleistocene coastlines; sometimes on ultrabasic rocks.
More
Mixed peat swamp forest over sand, podsols on cuestas, plateaux and terraces, near present or Pleistocene coastlines; on ultrabasic rocks in E. Sabah.
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Hardiness (USDA) 10-12

Usage

Uses wood
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Cultivation

Can be grown by seedlings.
Mode seedlings
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Distribution

Hopea pentanervia world distribution map, present in Brunei Darussalam and Malaysia

Conservation status

Hopea pentanervia threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:320974-1
WFO ID wfo-0000724628
COL ID 3MJGH
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Hopea pentanervia