Dipterocarpus fagineus Vesque

Species

Angiosperms > Malvales > Dipterocarpaceae > Dipterocarpus

Characteristics

Young twigs, leaf buds, stipule outside (glabrous within) and petiole shortly evenly densely persistently pale golden-brown pubescent, occasionally glabrous; midrib on both surfaces sparsely so. Twigs c. 2 mm ø near the apices, ribbed, smooth to rugulose. Bud to 10 by 2.5 mm, falcate, acute. Stipule to 20 by 3 mm, linear, caducous, sparsely pubescent outside, glabrescent within. Leaf Ar-9(-12) by 1.5-4.0(-5.5) cm, narrowly elliptic to lanceolate; frequently glaucous beneath; base cuneate; acumen to 8 mm long, slender; nerves 8-10(-16) pairs, slender but elevated beneath, at 30°-40°; tertiary nerves slender, subscalariform; midrib applanate above, prominently terete beneath; petiole 11-17 mm long, slender, geniculate, drying buff pubescent. Raceme to 5 cm long, caducously shortly evenly golden-buff pubescent, unbranched or sometimes singly branched, bearing to 4 flowers. Flower bud to 20 by 6 mm, fusiform. Calyx glabrescent. Corolla densely golden-buff pubescent outside, sparsely so within. Stamens 15, shorter than style at anthesis; filaments slender, tapering, c. 1/3 length of anther. Gynoecium cinereous but for the distal 1/3 of the style; ovary ovoid; style broadly columnar, somewhat tapering. Fruit calyx and pedicel glabrous. Pedicel to 6 mm long. Calyx tube to 10 by 8 mm, subglobose to ellipsoid, decurrent with pedicel at base, with 5 slender acute ribs continuous to base or confined to distal end; 2 longer lobes to c. 8(-20) by 1.5 cm, lorate, obtuse; 2 shorter lobes to 6 by 5 mm, deltoid, subacute. Nut apex densely golden-buff pubescent; style remnant 10 mm long, slender, pubescent.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Photosynthetic pathway c3

Environment

Hill forests, locally gregarious on ridges, especially at 500-800 m but down to 100 m near coast.
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Hardiness (USDA) 9-12

Usage

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Cultivation

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Distribution

Dipterocarpus fagineus world distribution map, present in Indonesia, India, and Malaysia

Conservation status

Dipterocarpus fagineus threat status: Critically Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320672-1
WFO ID wfo-0000651327
COL ID 6D9DH
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Dipterocarpus prismaticus Dipterocarpus pseudofagineus Dipterocarpus fagineus Duvaliella problematica