| Quercus nivea | |
| Author | King 1889 Ann. Roy. Bot. Gard. (Calcutta) 2: 31 |
| Synonyms | |
| Local names | |
| Range | Borneo
; Malaysia ; to 1000 m; |
| Growth habit | more
than 20 m tall; trunk to 0,4 m in diameter; |
| Leaves | 8-17
x 2.5-7 cm; leathery, thick; elliptic to oblonh; apex acute, acuminate
or caudate; base rounded or obtuse, sometimes asymmetrical; margin entire,
revolute; shiny, hairless above; pale, glaucous beneath from waxy coat
and small stellate hairs; 6-12 pairs of secondary veins parallel, flat
both sides, forming an angle of 60-70° with the midrib which is prominent
below; petiole slender, deeply furrowed above, stellate tomentose, glabrescent,
2-4 cm long; |
| Flowers | in
January-February; male catkins 5-20 cm long, densely stellate tomentose;
male flowers solitary or to 3 together, perianth 4-6-lobed, 4-6 stamens;
female inflorescences pubescent; pistillate flowers with tomentose perianth,
3-4 styles, ovary subglobose, staminodes often present; |
| Fruits | acorn
obovoid to subglobose, 2 cm in diameter, hairless, apex depressed, base
convex; enclosed 1/2 by cup; cup half-round, 1.5 cm in diameter, tapering
towards the base, glabrescent, with 4-7 concentric undulate rings; ripe
between June and July; |
|
Bark, twigs and |
pale grey, very thick bark; annual shoot densely tomentose at first with brownish stellate hairs, subglabrescent, slightly furrowed, with sparse lenticels; stipules linear, acute, deciduous, stellate tomentose, 3-4 mm long; |
| Hardiness zone, habitat | not
hardy; |
| Miscellaneous | --
A. Camus : n° 59; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Oidocarpa, sub-section Niveae (Menitsky). -- Rare species. Threatened (IUCN Red List Category : EN). -- Closely related to Q.argentata ; |
| Subspecies and varieties |
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| Pictures |
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