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Quercus thomsoniana | |
Author | A.DC 1864 Prodr. 16(2): 98 |
Synonyms | Cyclobalanopsis
thomsoniana (A.DC) Oerst. 1867 kamroopii var. thomsoniana (A.DC) V.Singh & P.Singh 1992 lineata var. thomsoniana (A.DC) Schottky & Wenzig.1886 |
Local names | |
Range | Sikkim; Bhutan; North Bangladesh; Myanmar; 1800-2400 m ; |
Growth habit | may reach 20 m tall; spreading crown; |
Leaves | 7-11 x 3-4.5 cm; lanceolate; apex pointed, asymmetrical; base rounded; margin minutely toothed at apical 3/4; shiny green, hairless above; whitish glaucous beneath with brownish tomentum; 13-17 vein pairs; petiole 1-1.5 cm long, tomentose; |
Flowers | male flowers with 4 stamens, on 2-6 cm long catkins; pistillate flowers solitary, terminal; 3 short styles; |
Fruits | acorn 1-1.8 cm long, 1.2-2.8 cm wide, flattened; hairless; shiny; apex depressed; cup half-round, sessile, saucer-shaped, enclosing 1/2 of nut; maturing in 1 year; |
Bark, twigs and |
bark grey or dark brown, peeling into square plates; young shoots brown tomentose; |
Hardiness zone, habitat | not quite hardy; all types of soils; very fast-growing; |
Miscellaneous | -- A. Camus : tome 1, p. 223,
n° 19; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Glauca, sub-section Lamellosae (Menitsky); -- Threatened (IUCN Red List Category : CR) -- Closely related to Q.lamellosa (which has larger leaves, with apex less acuminate, stellate hairs, acorn bigger); |
Subspecies and varieties |
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