Shorea biawak P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Small tree. Young twig, panicle, leaf bud and petiole shortly pale buff pubescent, persistent on panicle and leaf bud. Twig to 1 mm ø apically, slender, terete, much branched, smooth or striated. Bud to 1 mm long, small. Stipule unknown. Leaves 6-10 by 2.5-4.5 cm, obovate, thinly coriaceous; base obtuse or broadly cuneate; acumen to 1.5 cm long, narrow to caudate; nerves 5-6 pairs, slender, slightly raised beneath, slightly depressed above, arched, at 50°-60°, with small puberulent axillary domatia; tertiary nerves obscure, scalariform at c. 90°; midribs slightly raised beneath, slightly raised or applanate above; petiole 7-10 mm long, slender. Panicle to 14 cm long, terminal or 1-axillary, terete; singly branched, branchlets to 6 mm long, short, +-secund, bearing to 6 close secund flowers; bracteoles to 2 mm long, ovate, acute, puberulent, fugaceous. Flower bud to 1.5 mm long, globose. Calyx shortly puberulent outside, glabrous within; lobes broadly ovate, acute, subequal, the inner 2 slightly shorter and relatively wider, thinner. Petals elliptic, obtuse, puberulent outside, glabrous within. Stamens c. 35; filaments slender, tapering, glabrous; anthers narrowly oblong, sparsely barbate apically, tapering, the 2 outer sacs the larger; appendage to connective somewhat shorter than anther, densely barbate. Ovary and stylopodium ovoid to pyriform, densely pubescent, crowned by a short glabrous style. Fruit calyx lobes to 7 by 9 mm, subequal, shorter than nut, suborbicular, obtuse, thin, closely adpressed to nut, shortly persistently buff puberulent. Nut to 1.3 by 1 cm, subglobose, obtuse, densely pale buff pubescent; style remnant to 1.5 mm long.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
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Mature height (meter) 0.46 - 1.23
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Photosynthetic pathway c3

Environment

Local, clay ridges below 600 m, in mixed Dipterocarp forest.
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Usage

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Edible -
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Cultivation

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Distribution

Shorea biawak world distribution map, present in Brunei Darussalam

Conservation status

Shorea biawak threat status: Endangered

Identifiers

LSID urn:lsid:ipni.org:names:321220-1
WFO ID wfo-0000496658
COL ID 6YLMT
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea biawak