Dipterocarpus cinereus Slooten

Species

Angiosperms > Malvales > Dipterocarpaceae > Dipterocarpus

Characteristics

Large tree. Twig, leaf bud, stipule, petiole, leaf undersurface, panicle and ovary densely persistently buff pubescent; hairs longer on buds and stipules; calyx thus at first, becoming sparsely so in fruit; parts of petals exposed in bud densely puberulent. Twigs c. 2 mm ø apically, terete, rugulose, pale brown, much branched. Buds to 12 by 3 mm, lanceolate-falcate; expanded stipule not seen. Leaves 6-8 by 1.7-2.5 cm, lanceolate, thinly coriaceous, distinctly persistently plicate; base cuneate; apex shortly narrowly tapering-acuminate; nerves 8-9 pairs, steeply ascending at c. 40°, slender but distinctly elevated beneath; tertiary nerves densely scalariform, slender and obscure; midrib prominent beneath, shallowly depressed above; petiole 1.7-2.5 cm long, very slender. Inflorescence to 4 cm long, axillary, simple or singly branched, bearing 4-5 secund flowers. Flower buds to 22 by 8 mm, fusiform. Stamens c. 25, exceeding style at anthesis; filaments slender, somewhat longer than the narrow tapering anthers and appendage; style columnar, pubescent in the basal 1/2. Fruit pedicel to 3 mm long, broadening into the to 14 by 10 mm broadly ellipsoid or obovoid, sharply though narrowly 5-ribbed, calyx tube; 2 longer lobes to 5 by 1.2 cm, broadly spatulate, narrowly obtuse, constricted to c. 4 mm broad at base; 3 shorter lobes to 5 by 5 mm, ovate, obtuse, ± revolute.
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Growth form tree
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Sexuality hermaphrodite
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Environment

Lowland forest on leached soils, rather common.
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Hardiness (USDA) 9-12

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Cultivation

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Distribution

Dipterocarpus cinereus world distribution map, present in Indonesia

Conservation status

Dipterocarpus cinereus threat status: Critically Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320649-1
WFO ID wfo-0000651306
COL ID 36QTD
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INPN ID -
Wikipedia (EN)
Wikipedia (FR) Link

Synonyms

Dipterocarpus cinereus