Shorea atrinervosa Symington

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Large tree. Bud, twig and petiole at first caducous buff pubescent, outside of stipule persistently sparsely so, vegetative parts otherwise glabrous. Twig c. 2 mm ø apically, terete, drying ribbed; stipule scars short, pale horizontal. Bud to 4 by 2 mm, narrowly ovoid, acute. Stipule to 8 by 3 mm, lanceolate, acute, caducous. Leaves 8-16 by 3.5-9 cm, elliptic to ovate, frequently irregular in shape, coriaceous, undulate, ± persistently white lepidote beneath; base broadly cuneate to subcordate; acumen to 1 cm long; nerves 10-12 pairs, prominent beneath, glabrous, frequently somewhat sinuous, at 45°-55° except at base, sometimes with small glabrous axillary domatia; tertiary nerves sinuous, slender, scalariform; midrib raised above, prominently so beneath; petiole 12-22 mm long, terete. Panicle to 11 cm long, terminal or axillary, straight, terete, densely somewhat unevenly shortly pale grey pubescent; singly branched, branchlets to 2 cm long, bearing to 6 secund flowers; bracteoles to 3 by 2 mm, elliptic, acute, sparsely pubescent, caducous. Flower bud to 8 by 3 mm, fusiform. Calyx shortly pubescent on parts exposed in bud; lobes ovate, acute, the inner 2 somewhat shorter, thinner, than the outer 3; petals crimson at centre, cream at margins, linear, sericeous on both surfaces. Stamens 25-33; filaments compressed at base, tapering, sparsely setose; anthers oblong-elliptic, glabrous, the inner pair of pollen sacs shorter, setose. Ovary and stylopodium ovoid, pubescent, surmounted by a short glabrous style. Fruit pedicel to 4 by 2 mm, broadening into calyx. Fruit calyx sparsely pubescent, tomentum caducous except at base; 3 longer lobes to 11 by 2.5 cm, spatulate, obtuse, c. 1 mm broad above the to 10 by 8 mm ovate thickened prominently saccate base; 2 shorter lobes to 8.5 by 0.9 cm, lorate, acute, similar at base. Nut to 2 by 1.3 cm, ovoid, densely shortly evenly buff pubescent; stylopodium to 2 mm long, short, conical.
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A tree. The nut is 2.5 cm long by 1.5 cm wide.
Life form -
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Photosynthetic pathway c3

Environment

Undulating land in valleys, and on hillsides on clay rich soil, in mixed Dipterocarp forest; locally common.
More
It is a tropical plant.
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Hardiness (USDA) 9-12

Usage

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Edible nuts
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Cultivation

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Distribution

Shorea atrinervosa world distribution map, present in Brunei Darussalam, Indonesia, India, Malaysia, New Zealand, and Saudi Arabia

Conservation status

Shorea atrinervosa threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:321207-1
WFO ID wfo-0000500407
COL ID 6YLMM
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea atrinervosa