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Quercus treubiana | |
Author | Seemen 1906 Bull. Dép. Agric. Indes Néerl. 1: 3 |
Synonyms | Cyclobalanopsis treubiana (Seemen) Schottky, Bot. Jahrb. Syst. 47: 648 (1912). |
Local names | |
Range | Borneo (Sabah, ) ; Sumatra (Palembang) ; 600 to 2200 m; |
Growth habit | more than 20
metres tall; may reach 30 m, with trunk to 0.6 m in diameter; |
Leaves | 5-11 x 1-3 cm;
thin but coriaceous; narrowly lanceolate; base attenuate, acute, sometimes
asymmetrical; apex acute to acuminate; margine entire or remotely serrulate
on apical half; hairless above; pubescent beneath with minute simple
hairs; 5-10 vein pairs distantly spaced, parallel, forming an angle of
45-60° with the midrib, prominent both sides; petiole 1-2 cm long,
flat above, tomentose, glabrescent; |
Flowers | |
Fruits | acorn 2-3 cm
long, 1-2 cm in diameter, shortly cylindrical, ovoid or subglobose, pubescent,
apex depressed, base convex; enclosed 1/3 or 1/2 by cup; cupule halfround,
pubescent, with 10-12 undulate concentric rings; fruiting in July-August; |
Bark, twigs and |
bark
fissured into rectangular plates; twigs initially densely pubescent with
simple, brownish hairs, then glabrescent, with lenticels; terminal buds
ovoid to ellipsoid; stipules linear, acute, deciduous, pubescent, 5-10
mm long; |
Hardiness zone, habitat | not hardy; tropical mountain forests; |
Miscellaneous | --
Sub-genus Cerris, Section Cyclobalanopsis; -- Section Semiserrata, sub-section Gemelliflorae (Menitsky). -- A. Camus : tome 1, p. 368, n° 87 ; -- Threatened (IUCN Red List Category : VU). -- Melchior Treub, 1851–1910; former Director of the Bogor Botanic Gardens, Indonesia. |
Subspecies and varieties |
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Pictures |