Quercus kerrii Craib - FAGACEAE

Synonym : Cyclobalanopsis kerrii Craib

Common name : Oak

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Young leaves pinkish or mauve with golden brown hairs, mature leaves sharply toothed in upper leaf only. Fruits acorn shortly and densely clustered, cup covering half of nut, nut flattened on top with short tip.
Habit : Deciduous tree, 15 – 40 m tall, branches ascending. Presence of buttresses.
Trunk & bark : Bark dark brown to almost black, lenticellate, deeply fissured. Inner bark reddish, wood pale yellow.
Branches and branchlets or twigs : Twigs terete, puberulous with yellowish brown hairs when young, becoming glabrous, dark brown.
Exudates : Exudate absent.
Leaves : Leaves simple alternate and spiral, 9 - 24 by 3.5 - 8 cm, narrowly ovate, elliptic oblong, apex acute or obtuse, base attenuate or rounded, slightly asymmetric, margin sharply dentate in upper half, coriaceous, below tomentose.
Midrib flat above, primary vein single, secondary veins oblique to the midrib, widely parallel, tertiary veins oblique. Petiole hairy, stipules, free hairy.
Inflorescences or flowers : Flowers small, greenish, grouped in clusters of catkins.
Fruits : Fruits acorn in short and dense clusters, 1.5-2 by 2-3 cm, smooth.
Seeds : Nut with a short pedicel.

Habitat and ecology :

In moist evergreen, mixed deciduous, lower montane and deciduous Dipterocarp forests from 400 to 1250 m altitude. Flowering in March to April, fruiting in June to September.

Distribution :

Burma (Myanmar), Cambodia, China, Thailand (Northern and Southwestern), Vietnam and Laos (Khammouan, Xiengkhouang provinces).

Remark/notes/uses :
The wood may be used in construction and as firewood. Fruits edible in the cooked state.

Specimens studied :
BT 231, BT 297 (Herbarium of Faculty of Sciences-NUoL, NHN-Leiden and CIRAD-Montpellier).

Literature :
Flore Générale de l’Indochine. 1929. Vol. 5, Fasc. 8-10.
Chamlong Phengklai et al. Fagaceae of Thailand. 1984. BRT, The Thai Response to Biodiversity.
Gardner S., Sidisunthorn P. & Anusarnsunthorn V. 2000. A field guide to Forest Trees of Northern Thailand. Kobfai Publishing Project. Bangkok. Thailand.
Lehmann L., M. Greijmans and D. Shenman. 2003. Forests and trees of the central highlands of Xieng Khouang Lao PDR, A field guide. Lao Tree Seed Project, Vientiane, Laos.
Chamlong Phengklai. 2006. Thai Forest Bulletin, no 34. Bangkok, The Forest Herbarium.

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