Oaks of the World

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

  Quercus eumorpha
Author Kurz 1873 J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 42(2): 107
Synonyms Lithocarpus eumorphus (Kurz) A.Camus 1931
ramsbottomii A.Camus 1936
Bull. Soc. Bot. France 83: 343 (Camus n° 29)
Cyclobalanopsis ramsbottomii (A.Camus) Hjelmq. 1968
lenticellata Barnett 1938 Bull. Misc. Inform. Kew 1938: 98
Cyclobalanopsis lenticellata (Barnett) Hjelmq. 1968
Local names
Range Myanmar; Thailand; to 2100 m;
Growth habit may reach more than 30 m high;
Leaves 6-10 X 2.5-4.5 cm; oval lanceolate, leathery; apex acuminate ; base cuneate ; entire or slightly crenate, with sometimes small teeth at apical 1/2; green, glabrous above; glaucous beneath with tawny hairs; 6-13 pairs of secondary veins; petiole to 1 cm; 
Flowers female catkin 5 cm long, with 1-2 cups;
Fruits acorn ovoid to 2 cm long and 1.6 cm in diametre, singly or paired, or to 5, on a long peduncle; cup halfround, with 5-8 concentric rings covered with tawny pubescence; maturing in 1 year; 

Bark, twigs and
buds

annual shoot hairless, with light, prominent lenticels;
Hardiness zone, habitat not hardy
Miscellaneous -- Camus : tome 1, p. 362, n° 80;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Semiserrata, sub-section Eumorphae (Menitsky).

-- Threatened (IUCN Red List Category : EN).

Subspecies and
varieties
-- For Menitsky (1976), there is a subspecies : subsp yaiensis, in Thailand, differing from the type in having larger elliptic leaves, with more secondary veins (12-15 pairs), and a bigger acorn.

-- Moreover, Q. lenticellata is considered by Menitsky as a true species that reaches 40 m for a trunk to 1 m in diameter; leaves identical but toothed at the apical half; 14-16 pairs of secondary veins impressed above and slightly raised beneath. Section Glauca, sub-section Oxyodontes (Menitsky); threatened (IUCN Red List Category : EN)



-- In 2007, Govaerts thinks Q. ramsbottomii is a true species, in Myanmar to Thailand; Camus : tome 1, p. 240, n° 29 :
young twig rusty pubescent, then hairless; leaves 8-12 cm x 4-6, ovate or ovate-lanceolate, base attenuate, apex shortly acuminate, slightly violaceous beneath; margin entire or toothed near apex; 9-10 vein pairs, at 40-45° with midrib; petiole 5-8 mm long; male catkin yellowish tomentose; pistillate catkin 2-3 m, with 6 flowers (only two will give acorns); acorn 1.8 cm long, 1.5 cm wide, hairless, mucronate; cup sub-halfround tomentose, with 6-8 rings denticulate; 1800 to 1950 m;

Pictures