Shorea rubra P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Medium-sized or large buttressed tree with dark bark. Twig, panicle, bud, stipule (both surfaces, shorter within), petiole, midrib above and leaf beneath densely persistently deep rufous-brown scabrid pubescent. Twig to 1.5 mm ø apically, terete, much branched, becoming smooth; stipule scars c. 1 mm long, short, narrow, descending. Bud 4-7 by 3-4.5 mm, compressed, ovoid, broadly acute. Stipule to 16 by 5 mm, hastate, subacute. Leaves 8-13 by 4-7.5 cm, broadly ovate, thinly coriaceous; base obtuse; acumen to 1.3 cm long; margin narrowly revolute; nerves 11-13 pairs, prominent beneath, curved distally, at 40°-50°; tertiary nerves slender, densely scalariform, diagonal to nerves; midrib prominently terete beneath, narrow and shallowly depressed above; petiole 1-1.4 cm long. Panicle to 14 cm long, terminal or axillary, terete, rather straight and ridged; singly or doubly regularly branched, branchlets short, compact, bearing to 5 distichous flowers; bracteoles to 4 by 3.5 mm, broadly ovate, subacute, imbricate round the bud, shortly pale buff pubescent outside, more sparsely so within. Flower bud to 7 by 4 mm, ellipsoid to subglobose, obtuse. Calyx densely pale grey pubescent outside, glabrous within; 3 outer lobes deltoid-ovate, obtuse; 2 inner lobes smaller, broadly ovate, acute. Petals pale yellow, narrowly oblong, subacute, shortly pubescent on parts exposed in bud. Stamens 15, of 3 lengths, the inner 5 being almost twice as long as the others; filaments of outer 10 tapering gradually to anther, filaments of inner 5 oblong, broad, tapering abruptly distally; anthers subglobose; appendage to connective shorter than anther, becoming slightly reflexed. Ovary and stylopodium ovoid-conical, densely pubescent except at the base; style shorter than ovary, glabrous. Fruit calyx sparsely puberulent, glabrescent; 3 longer lobes to 11 by 1.6 cm, narrowly spatulate, obtuse, to 5 mm broad above the to 8 by 6 mm deeply saccate thickened base; 3 shorter lobes to 4.5 by 0.4 cm, subequal linear, acute, similarly expanded at base. Nut to 10 by 9 mm, broadly ovoid, shortly densely evenly pale buff pubescent. Style remnant to 2 mm long, tapering.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Environment

Uncommon, on sandy clay soils on low hills and ridges to 1350 m.
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Cultivation

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Distribution

Shorea rubra world distribution map, present in Brunei Darussalam and Saudi Arabia

Conservation status

Shorea rubra threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:321432-1
WFO ID wfo-0000499344
COL ID 4X52W
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Shorea rubra