Hopea rudiformis P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Hopea

Characteristics

Medium-sized tree. Twigs, leaf buds and parts of petals exposed in bud densely ± persistently pale tawny puberulent; panicles sparsely so; calyx outside and nerves and midrib beneath sparsely caducously so. Twigs c. 2 mm ø apically, rather straight, ribbed, becoming smooth, dark brown. Bud small, ovoid, acute; stipules fugaceous, unknown. Leaves 6.5-14 by 3.5-7.5 cm, ovate to broadly lanceolate, thinly coriaceous, minutely stellate lepidote and appearing pale and dull beneath; margin subrevolute; base broadly cuneate; acumen to 1.5 cm long, broad, tapering, down curved and twisted over on pressing; nerves 11-13 pairs, slender but prominent beneath, +-obscurely depressed above, arched, at 55°-65°; secondary nerves few, short, hardly elevated beneath; tertiary nerves densely scalariform, obscure; petiole 8-13 mm long. Panicle to 3.5 cm long, to 2-axillary; singly branched, branchlets bearing to 3 flowers; bracts unknown, fugaceous. Flower bud to 3 by 2 mm, ovoid, small. Sepals subequal, broadly ovate, subacuminate. Stamens 15, in 3 subequal verticels; filaments compressed at base, tapering medially and filiform below the shortly oblong anthers; appendages slightly longer than anthers, short, slender. Ovary ovoid, surmounted by an indistinct tapering ciliate stylopodium, and short columnar style c. 1/2 length of ovary and stylopodium. Fruit pedicel to 2 mm long, short, base of ripe fruit ± impressed. 2 longer calyx lobes to 9 by 2 cm, broadly spatulate, obtuse, c. 3 mm broad above the to 6 by 5 mm ovate deeply saccate thickened base; 3 shorter lobes to 8 by 8 mm, ovate, chartaceous at margin, subacute, reaching apex of nut and adpressed to it; nut to 8 by 8 mm, ovoid, terminating in the persistently truncate stylopodium.
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Growth form tree
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Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
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Mature height (meter) 30.0
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Environment

A mid-canopy tree in undisturbed mixed dipterocarp forests at elevations up to 200 metres. Grows on undulating land on deep well drained soil in lowlands; sometimes in freshwater swamps.
More
Undulating land on deep well drained soil in lowlands; sometimes in freshwater swamps.
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Hardiness (USDA) 10-12

Usage

Uses timber
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Cultivation

Can be grown by seedlings.
Mode seedlings
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Distribution

Hopea rudiformis world distribution map, present in Indonesia and Malaysia

Conservation status

Hopea rudiformis threat status: Critically Endangered

Identifiers

LSID urn:lsid:ipni.org:names:320986-1
WFO ID wfo-0000724642
COL ID 3MJGY
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Hopea rudiformis