Oaks of the World

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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