Dryobalanops rappa Becc.

Species

Angiosperms > Malvales > Dipterocarpaceae > Dryobalanops

Characteristics

Young twig, raceme, stipule and bud, petiole, midrib and leaf beneath densely powdery caducous or persistent rufous tomentose. Twigs slender, becoming smooth but for minute, warty lenticels. Bud 3-6 by 2-3 mm, ovoid, subacute, slightly compressed. Stipule 5-8 mm long, linear. Leaves 6-11 by 2.5-4 cm, ovate-lanceolate, coriaceous, base obtuse; acumen to 1 cm long, narrow; midrib prominent, grooved, beneath; petiole 6-10 mm long, stout. Panicle to 8 cm long, terminal or axillary, ribbed apically on drying, otherwise terete; regularly alternately doubly branched, branchlets bearing up to 4 flowers; bracteoles linear, fugaceous. Flower bud to 10 by 5 mm, ellipsoid, acute. Petals cream, lanceolate, glabrous. Sepals equal, narrowly deltoid, obtuse, glabrous. Stamens c. 30, subequal, reaching to below style apex; filaments united in a tube round the ovary, tapering apically to the anthers, c. 2/3 length of anthers; anthers narrowly oblong, tapering; appendage to connective erect, extending somewhat above anther apex. Ovary ovoid, glabrous; style twice as long as ovary, filiform, tapering, glabrous. Base of fruit calyx 5-8 mm ø, 3 mm deep, shallowly cupped; lobes to 5 by 0.6 cm, linear to spatulate, subacute, 2.5-3.5 mm broad at the base. Nut to 10 by 6 mm, ovoid, glabrous, crowned by a c. 6 mm long slender persistent style remnant.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Photosynthetic pathway c3

Environment

Common, locally dominant and gregarious, in mixed Peat Swamp forest overlying sand terraces, and on podsols below 200 m.
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Hardiness (USDA) 10-12

Usage

Uses. Considered of inferior quality, darker, harder and more liable to splitting than other species.
Uses material
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Cultivation

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Distribution

Dryobalanops rappa world distribution map, present in Brunei Darussalam and Malaysia

Conservation status

Dryobalanops rappa threat status: Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320819-1
WFO ID wfo-0000657528
COL ID 37V4X
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Dryobalanops rappa