Oaks of the World

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

  Quercus gemelliflora
Author Blume 1825
Synonyms Cyclobalanopsis gemelliflora (Bl.) Oerst. 1867
crassilamellata (Gamble) A.Camus 1931 (A. Camus : n° 21)
horsfieldii MiQ.1856
lineata var. merkusii (Endl.)Wenzig 1886
merkusii Endl. 1848
semiserrata var. mannii Hook.f. 1888
turbinata Bl. 1826 (A. Camus = n° 12)
turbinata var. crassilamellata Gamble 1915
Local names  
Range Borneo, Java, Sumatra, W Malaysia; 600-2000 m;
Growth habit tall tree 30 m and more; trunk to 0.60m in diameter;
Leaves 7-20 x 3-6 cm; thin, chartaceous; elliptic or lanceolate or oblanceolate or oboval; apex acute, acuminate or caudate; base acute or attenuate, often asymmetrical; margin plane, serrulate towards apical 1/2; glabrous above; glabrescent beneath; 8-10 pairs of secondary veins weakly raised below, forming an angle of 45-60° with the midrib; petiole tomentose 1-4 cm long, flat above, glabrescent;
Flowers male catkins many-flowered, 3-6 cm long, hairy ; male flowers single or to 3, perianth 3-6-lobed, hairy, 3-6 stamens; female inflorescence 2-7-flowered, perianth 4-6-lobed, hairy, 0-6 staminodes, 4-6 styles 1-2 mm long;
Fruits acorn conical, 2-5 cm long, with obtuse apex and rounded base; most often paired along rachis; subsessile or on a short peduncle; cup enclosing 1/3 to 1/2 of nut, with 6-8 brownish, pubescent, denticulate rings;

Bark, twigs and

greyish brown bark, smooth or finely fissured; young shoot pubescent becoming hairless;  terminal buds ovoid or subglobose; stipules linear, acute, hairy, 5-10 mm long;
Hardiness zone, habitat not hardy; wet mixed forests; 
Miscellaneous -- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Semiserrata, sub-section Gemelliflorae (Menitsky).
-- Strongly variable species (shape of leaves, pubescence of twigs, acorn);
Subspecies and