Dipterocarpus oblongifolius Blume

Species

Angiosperms > Malvales > Dipterocarpaceae > Dipterocarpus

Characteristics

Twig, leaf bud, midrib on both surfaces, nervation beneath, petiole, and raceme densely ± evenly caducous pale yellow tomentose; persistently so on stipule outside, calyx and ovary. Twig 2-3 mm ø apically, terete or +-compressed; amplexicaul stipule scars inconspicuous. Bud c. 20 by 3 mm, linear, compressed, acute. Stipule 10-15 by 1.5 cm, linear, obtuse. Leaves 14-18(-25) by 4-7(-9) cm, narrowly elliptic to lanceolate; base cuneate; apex gradually tapering; acumen to 1 cm long, slender; nerves 16-20 pairs, slender, at 40°-50°; petiole lf-2 cm long. Racemes to 18 cm long, terminal and axillary, simple or singly branched, with distichous flowers; bracts to 20 by 2.5 mm, linear. Calyx densely cream tomentose. Stamens 15, shorter than style; anther as long as the filament, narrowly oblong, tapering from the base into the glabrous stout appendage; ± shorter than anther; ovary conical, densely tomentose, tapering into the stylopodium, the latter twice as long as the ovary, narrowly-cylindrical, tapering into and +-twice as long as the filiform glabrous style. Fruit pedicel 1-2 mm long. Fruit calyx tube 25-30 by 7-9 mm, narrowly obovoid or fusiform, only slightly constricted at the c. 6 mm ø neck, with 5 wavy, c. 1 mm wide, thin wings from neck to base; 2 longer lobes 10-12 by 1.5 cm, narrowly spatulate, obtuse, 3-4 mm wide at base, 1-nerved with 2 small lateral nerves at the base; 3 shorter lobes c. 10 by 3 mm, narrowly deltoid to linear, obtuse, recurved. Saplings stenophyllous.
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A tree.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Photosynthetic pathway c3

Environment

Gregarious on the banks of fast-flowing inland rivers, germinating and becoming established below the flood-line.
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It is a tropical plant.
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Hardiness (USDA) 9-12

Usage

Uses material
Edible fruits
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Cultivation

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Images

Leaf

Dipterocarpus oblongifolius leaf picture by Adeline Lee (cc-by-sa)

Fruit

Dipterocarpus oblongifolius fruit picture by Adeline Lee (cc-by-sa)

Distribution

Dipterocarpus oblongifolius world distribution map, present in Brunei Darussalam, India, Malaysia, and Thailand

Conservation status

Dipterocarpus oblongifolius threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:320725-1
WFO ID wfo-0000651383
COL ID 36QVQ
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Dipterocarpus oblongifolius Dipterocarpus pulcherrimus Dipterocarpus stenopterus