Hopea subalata Symington

Species

Angiosperms > Malvales > Dipterocarpaceae > Hopea

Characteristics

Small tree. Twigs and petioles sparsely fugaceous puberulent, petals outside cream pubescent, parts otherwise glabrous. Twig c. 1 mm ø apically, slender, dark brown, at first ribbed along the leaf traces; internodes 1.5-2.5 cm long; stipule scars obscure. Leaf bud minute, ovoid; stipule to 5 mm long, linear, caducous. Leaves 4.5-10 by 2.3-5 cm, ovate-lanceolate, thinly coriaceous; base broadly cuneate; acumen to 1.5 cm long, subcuspidate; nervation subdryobalanoid; main nerves c. 12 pairs, arched, frequently with small pubescent axillary domatia, slender but distinctly elevated beneath, obscurely depressed above as also the many shorter secondaries; tertiary nerve subscalariform, obscure; midrib sharply prominent beneath, narrowly depressed above; petiole 5-7 mm long, short. Panicle to 5 cm long, axillary ot terminal, slender, lax, with to 2.5 cm long branchlets bearing to 5 flowers; bracteoles to 1 mm long, deltoid, apiculate, subpersistent. Flower buds to 3 by 2 mm, ovoid; sepals suborbicular, obtuse or subacute, sub-equal; petals purple; stamens 15, filaments short, compressed, tapering immediately beneath the subglobose anthers; appendages very slender, 2-4 times length of anthers; ovary and stylopodium cylindrical, equal, subtruncate, punctate distally, with short stout tapering style. Fruit pedicel to 2 mm long and Ø. Fruit calyx lobes to 10 by 8 mm, ovate, subequal, saccate, thickened, enclosing the nut (the apex excepted), 1(-2) lobes generally with a to 10 by 3 mm aliform apical extension. Nut to 10 by 8 mm, ovoid, crowned by a truncate conical stylopodium with central terminal apiculus.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Photosynthetic pathway c3

Environment

Locally common in one locality, on low hills.
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Hardiness (USDA) 10-12

Usage

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Edible -
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Cultivation

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Distribution

Hopea subalata world distribution map, present in Brunei Darussalam, India, and Malaysia

Conservation status

Hopea subalata threat status: Critically Endangered

Identifiers

LSID urn:lsid:ipni.org:names:321009-1
WFO ID wfo-0000724670
COL ID 3MJHR
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Hopea subalata