Hopea helferi Brandis

Species

Angiosperms > Malvales > Dipterocarpaceae > Hopea

Characteristics

Large dark flaky-barked tree with hard wood. Twig apices, buds, petiole, leaf nervation beneath, stipules, panicles and perianth outside densely buff puberulent, ± caducous on twigs, leaf beneath, and calyx. Twig c. 3 mm ø apically, blackish, becoming ribbed along the leaf traces; stipule scars obscure. Bud to 3 by 2 mm, ovoid, acute; stipules to 9 mm long, linear, caducous. Leaves (5-)10-24 by (2-)4.5-8 cm, oblong-lanceolate or occasionally oblanceolate, coriaceous, silvery lepidote beneath; base cuneate to occasionally cordate (especially sucker-shoots and young trees), subequal; apex shortly broadly acuminate or obtuse; nerves (12-) 14-16 pairs, ascending, rather straight, slender but prominent beneath, obscure above; tertiary nerves densely scalariform, evident beneath; midrib prominent beneath, evident but shallowly channelled above; petiole (5-)7-11 mm, c. 3 mm ø, stout. Panicle to 11 cm long, terminal or subterminal axillary, becoming lax; twice-branched, with to 2 cm long branchlets bearing to 10 ± secund cream flowers. Flower bud to 3 by 2 mm, lanceolate. Outer 2 sepals lanceolate, subacute; inner 3 shorter, ovate, subacuminate. Stamens 15; filaments broadly compressed at base, tapering and filiform distally; appendages slender, c. 1½ x length of the narrowly ellipsoid anthers. Ovary and stylopodium cylindrical, subtruncate, equal in height but the ovary the broader; style shorter than either, columnar. Fruit pedicel to 2 mm long, slender. 2 longer fruit calyx lobes to 6.5 by 1.8 cm, spatulate, obtuse, c. 4 mm wide above the c. 5 by 3 mm small elliptic saccate base; 3 shorter lobes to 5 by 3 mm, ovate (occasionally to 18 mm long and distally lorate). Nut to 10 by 7 mm, ovoid-apiculate.
Life form -
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
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Mature height (meter) 35.0
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Photosynthetic pathway c3

Environment

Occurs solitarily or in small groups on hill slopes and undulating land in semi-evergreen forest and moist evergreen forests, dry evergreen forests and riparian forests.
More
Deep soils, especially on sedimentary rocks on hill slopes and undulating land in semi-evergreen forest.
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Hardiness (USDA) 9-12

Usage

Uses. A valuable construction timber.
Uses material timber wood
Edible -
Therapeutic use -
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Cultivation

Can be grown by seedlings.
Mode seedlings
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Images

Distribution

Hopea helferi world distribution map, present in India, Cambodia, Myanmar, Malaysia, and Thailand

Conservation status

Hopea helferi threat status: Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320910-1
WFO ID wfo-0000724555
COL ID 6MCG9
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea helferi Vatica helferi Hopea suavis Hopea dealbata Hopea helferi