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| Quercus sumatrana | |
| Author | Soepadmo 1966 Gard. Bull. Singapore 21: 387 |
| Synonyms | |
| Local names | |
| Range | Sumatra, Borneo ; to 1300 m; |
| Growth habit | more than 30 metres tall; trunk to 1.3 m in diameter; |
| Leaves | 10-22 cm x 3-7; chartaceous; elliptic or lanceolate; base acute, attenuate; apex acute; margin plane, remotely serrulate on apical half; glabrous, pale grey brown adaxially; glaucous, sparsely pubescent beneath with stiff, simple hairs; 8-13 vein pairs parallel, distantly spaced, prominent below and slightly so above, forming an angle of 45-60° with the midrib; petiole thin, 1-2 cm long, flat obove, sparsely tomentose; |
| Flowers | |
| Fruits | acorn ovoid
to conical, 2-2.5 cm long, silky, glabrescent, with depressed apex and
flat or impressed basal scar; cupule saucer-shaped with thick wall, tomentose,
with 4-6 denticulate rings, covering 1/6 to 1/5 of fruit; |
|
Bark, twigs and |
bark
grey; twig initially densely pubescent, glabrescent, smooth, with lenticels;
terminal buds ovoid to subglobulose, 2-3 mm long; stipules linear, 5-7
mm long, densely |
| Hardiness zone, habitat | not hardy; |
| Miscellaneous | --
-- Rare; only herbarium specimens are studied; |
| Subspecies and varieties |
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| Pictures |