Quercus kerangasensis Soepadmo

Species

Angiosperms > Fagales > Fagaceae > Quercus

Characteristics

Tree, 20-30 m, 25-50 cm ø; buttresses small, fluted; bark smooth or rough, lenticellate, grey. Branchlets initially densely stiff-pubescent, late glabrescent, greyish brown, densely warty lenticellate; terminal buds ovoid-globose, 3-6 by 3-4 mm. Stipules linear-acute, 2-3 by ½-I mm. Leaves elliptic-lanceolate, coriaceous, 4-11 by 2-4 cm, above glossy, glabrous, underneath pale glaucous, glabrous except on the midrib, entire; base attenuate-acute, top acute or ½-1 cm acuminate; midrib and nerves prominent beneath, slightly so above; nerves 7-10 pairs, ascending, subparallel, arcuating towards the margin, at an angle of 60-70°; reticulation obscure on both surfaces; petiole 8-12 by ½-1 mm, densely pubescent, glabrescent, adaxially flat or shallowly furrowed. Male rachis 1-2 cm; bracts membranous, ovate-acute, densely stiff-pubescent outside, 1 by 1 mm; ♂ flowers with membranous perianth, filaments 1-2 mm. Ripe cupule cup-shaped, obconical, 8-12 mm high, 1½-2 cm ø, base attenuate, rim 1-1½ mm thick, densely brownish tomentose on both surfaces; lamellae 5-7, entire or denticulate. Ripe fruit ovoid-conical or ovoid-cylindrical, 2-3 cm by 12-15 mm, densely sericeous, glabrescent, top rounded or acute, base convex.
Life form -
Growth form tree
Growth support -
Foliage retention evergreen
Sexuality monoecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 20.0 - 30.0
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Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
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Nitrogen fixer -
Photosynthetic pathway -

Environment

Primary heath (‘kerangas’) forests, to 100 m. Fl.--06, fr.--09.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 10-12

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 120 - 365
Germination temperacture (C°) 10
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Germination treatment -
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Optimum temperature (C°) -
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Distribution

Quercus kerangasensis world distribution map, present in Brunei Darussalam, Indonesia, and Malaysia

Conservation status

Quercus kerangasensis threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:359750-1
WFO ID wfo-0000291464
COL ID 793PJ
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Quercus kerangasensis