Lithocarpus rigidus Soepadmo

Species

Angiosperms > Fagales > Fagaceae > Lithocarpus

Characteristics

Tree 6-18 m, 30 cm ø. Branchlets sturdy, with short internodes and thick nodes, glabrous, dark-brown, sparsely lenticellate; terminal buds ovoid-ellipsoid, 7-10 by 3-5 mm, scales narrowly ovate, 5-7 by 2-3 mm, initially with sparse minute stellate hairs, soon glabrescent. Stipules ovate-acute to lanceolate, 6-8 by 3-4 mm. Leaves thick-coriaceous, rigid, (8-)14-16(-18) by (5-)6-8(-10) cm (index 1½-2), broadest at or above the middle; surfaces concolorous, pale yellowish brown, above glabrous, glossy, underneath sparsely tomentose by minute, adpressed, stellate hairs; base acute, decurrent to the base of the petiole, margin strongly recurved, top bluntly rounded-acute or rounded; midrib broad, prominent on both surfaces, nerves 8-11 pairs, prominent beneath, flat to impressed above, subparallel, at an angle of 50-80°, arcuating but not anastomosing towards the margin; reticulation fine, subscalariform to irregular, obscure on both sides; petiole 7-10 mm, 5-6 mm ø, adaxially flat, glabrous. Male rachis (not fully developed) c. 5 cm, 3-4 mm ø, sparsely stellate-tomentose; bracts linear, 5-7 by 1-2 mm, bracteoles ovate, 3-4 by 2 mm; ♂ flowers in clusters of 3. Female flowers (on young cupule) with perianth 6-lobed, staminodes 12, rudimentary, styles 3, conical, 1-2 mm, recurved and glabrous near the top. Fruiting rachis (not fully developed) 15-20 cm, ½-1 cm ø, sparsely fulvous stellate-tomentose; young cupule sessile, mostly in clusters of 3, densely fulvous stellate-tomentose; scales minute, adpressed, concentrically arranged. Young fruit ovoid, glabrous, chocolate-brown, top rounded-acuminate.
Life form -
Growth form tree
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Foliage retention evergreen
Sexuality monoecy
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Mature width (meter) -
Mature height (meter) 6.0 - 18.0
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Rooting depth (meter) -
Root diameter (meter) 0.6
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Environment

Everwet forests, at 1500-2500 m. Fl. March-April, fr.--07.
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Hardiness (USDA) 10-12

Usage

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Edible -
Therapeutic use -
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Animal toxicity -

Cultivation

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Distribution

Lithocarpus rigidus world distribution map, present in Malaysia and South Sudan

Identifiers

LSID urn:lsid:ipni.org:names:358972-1
WFO ID wfo-0000230213
COL ID 3VK4T
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Lithocarpus rigidus