Oaks of the World

General data Classifications List of species Local names Back to
home page

  Quercus thomsoniana
Author A.DC 1864
Synonyms Cyclobalanopsis thomsoniana (A.DC) Oerst. 1867
kamroopii D.Don 1825
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 : n 19;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Glauca, sub-section Lamellosae (Menitsky);
-- Closely related to Q.lamellosa (which has larger leaves, with apex less acuminate, stellate hairs, acorn bigger);
-- Considering the rules of precedence, this taxon should be named "Q.kamroopii D.Don 1825", but some authors (V.Singh & P.Singh) think it is a variety of Q.kamroopii..., the latter beeing what exactly ?
Subspecies and