Dipterocarpus cuspidatus P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Dipterocarpus

Characteristics

Leaf bud densely persistently long buff tomentose; twig, petiole, midrib above and leaf nervation beneath sparsely long pale grey-brown subpersistent tomentose. Twig c. 1 mm ø apically, slender, terete, much branched; stipule scars slender, obscure. Bud to 7 by 3 mm, oblong; stipule unknown, caducous. Leaves 6-11 by 2-4 cm, narrowly elliptic-ovate, applanate with plicate folding almost disappearing when fully expanded; base obtuse to rarely cuneate; acumen to 2 cm long, prominent, slender, cuspidate; nerves 8-9 pairs, slender but prominent beneath, at 40°-50°; tertiary nerves densely scalariform; midrib slender, prominent beneath; petiole 12-18 mm long, slender, geniculate. Flower unknown. Raceme to 5 cm long, terminal or axillary, terete, slender, sparsely persistently long grey-brown tomentose, singly branched. Fruit pedicel to 5 mm long, prominent. Calyx glabrous; 2 longer lobes to 8 by 1.8 cm, spatulate, obtuse to subacute, c. 6 mm broad at the tube; 3 shorter lobes to 9 by 4 mm, oblong, obtuse, somewhat revolute; tube to 2 cm long, to 1.8 cm ø, with 5 prominent wings; wings thin, somewhat undulate, tapering into the base but to 9 mm broad and subauriculate apically. Nut to 3 by 1.6 cm, ovoid, greatly exceeding the length of the calyx tube.
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Sexuality hermaphrodite
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Environment

Rare: Mixed Dipterocarp forest on undulating land and low hills.
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Cultivation

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Distribution

Dipterocarpus cuspidatus world distribution map, present in Malaysia

Conservation status

Dipterocarpus cuspidatus threat status: Critically Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320663-1
WFO ID wfo-0000651320
COL ID 36QTS
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Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Dipterocarpus cuspidatus