Shorea alutacea P.S.Ashton

Species

Angiosperms > Malvales > Dipterocarpaceae > Shorea

Characteristics

Medium-sized tree. Twigs, stipules, leaf buds, petioles and midrib shortly densely persistently buff pubescent, leaf nervation and surface beneath sparsely so. Twigs c. 2 mm ø near the apices, terete; stipule scars c. 1.5 mm long, horizontal, evident. Bud c. 2 by 1.5 mm, ovoid, acute, small. Stipule to 8 by 3 mm, narrowly deltoid, acute, relatively large. Leaves 15-22 by 6-8 cm, ovate to lanceolate, undulate, chartaceous, with cordate base; acumen to 1 cm long, narrow; nerves 14-19 pairs, slender, narrowly depressed above, slender and prominent beneath, at up to 100° at base, 60°-70° distally; tertiary nerves subscalariform, slender, indistinct; midrib depressed above, prominent, terete beneath; petiole 6-10 mm long, drying rugose. Panicle to 15 cm long, terete, straight, densely shortly pale buff pubescent; singly or doubly branched, branchlets to 2.5 cm long; bracteoles to 4 by 3 mm, ovate, acute, densely shortly buff fugaceous pubescent. Flowers secund; buds to 6 by 3 mm, ellipsoid, relatively large. Calyx densely pubescent on parts exposed in bud; sepals broadly ovate, subequal, the inner 2 shortly acuminate, thinner towards the margin and narrower at the base than the acute outer 3. Petals lanceolate, pale yellow, pubescent on parts exposed in bud; imbricate at base after opening forming a cup; spreading and twisted distally. Stamens 15, in 3 unequal verticils the appendages of the inner 5 exceeding the style apex; filaments broad and compressed at base, tapering and filiform distally; anthers broadly oblong; appendage to connective slender, 3-4 times as long as anther, glabrous. Ovary and stylopodium pyriform, densely pubescent, tapering into a glabrous columnar style equal in length to the stylopodium. Fruit pedicel and calyx shortly sparsely caducous pubescent. Pedicel c. 1 mm long, short. 3 longer calyx lobes to 8 by 1.8 cm, spatulate, c. 4 mm broad above the to 7 by 7 mm ovate saccate thickened base; 2 shorter lobes to 6 by 1.2 cm, otherwise similar to longer lobes. Nut to 2.2 by 1 cm, narrowly ovoid, shortly apiculate, densely shortly evenly buff pubescent.
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Growth form tree
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Sexuality hermaphrodite
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Environment

Rare, lower slopes of granodiorite mountains.
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Cultivation

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Distribution

Shorea alutacea world distribution map, present in Malaysia

Conservation status

Shorea alutacea threat status: Endangered

Identifiers

LSID urn:lsid:ipni.org:names:321195-1
WFO ID wfo-0000500374
COL ID 6YLMG
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Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Shorea alutacea