Oaks of the World

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  Quercus blakei
Author Skan 1901 Hooker's Icon. Pl. 27: t. 2662 1899.
Synonyms Cyclobalanopsis blakei (Skan) Schottky 1912
blakei var. parvifolia Merrill 1927
blackei J.C.Lee 1935
chrysocalyx Hick. & A.Camus 1921 (A. Camus = n 64 Ann. Sci. Nat., Bot. X, 3: 385)
Cyclobalanopsis chrysocalyx (Hick. & A.Camus) Hjelmq.1968
Local names li zi qing gang ;
Range China (Hainan, Guizhou, Guangxi, Guangdong ); Laos; Vietnam; from 100 to 2500 m;
Growth habit 10-15 m high, but reaches 30 m ;
Leaves

8-17 x 2-4 cm; narrowly elliptic-oval to oval-lanceolate; leathery; lustrous green above, densely tomentose underneath (young leaves have a reddish tomentum); margins entire, apical 1/2 toothed; base cuneate, apex acuminate; 8-14 pairs of lateral veins, abaxially raised; petiole slender, glabrous, 1.5-3 cm long;

Flowers female flowers in March, on 2 cm inflorescences;
Fruits acorn ovoid, 2.5-3.5 cm long, 1.5-3 cm in diameter, singly or paired; cup thin (1 mm), 5-10 mm long, 20-30 mm wide, with 6-7 rings denticulate at rim, outer surface grey brown tomentose, orangish silky inside, flattened, covering only base of nut; basal scar 7-11 mm wide, flat or impressed; stylopodium persistent, glabrescent; ripe in 1 year; 

Bark, twigs and
buds

branchlets glabrous; numerous lenticels on 2 years old twigs;
Hardiness zone, habitat not hardy;
Miscellaneous -- A. Camus : n 3;
-- Flora of China : n° 36;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Semiserrata, sub-section Gemelliflorae (Menitsky).
-- For some Authors, it is a synonym of Q.glauca Thunb., (including Q.vaniotii = Q.blakei var. vaniotii (H.Lv.) Chun 1928; see Q.glauca ...).
Subspecies and
varieties

-- The specimens from China have been isolated as true species by Hickel & A. Camus under name Q. chrysocalyx (opinion shared with Govaerts & Frodin), but are actually conspecific with Q.blakei;

-- The plants from Hainan have small leaves, and have been described under "var. parvifolia Merrill 1942", but they are, for Menitsky (1974) probably a geographical form;

Pictures

drawing 1
drawing 2