Oaks of the World

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  Quercus xanthotricha
Author A.Camus 1935 Chênes Atlas 2: 119
Synonyms Cyclobalanopsis xanthotricha (A.Camus) Hsu & Wei Jen 1993
Cyclobalanopsis fuhsingensis (Chang) Chang ex Hsu & Wei Jen 1976
djiringensis A.Camus 1935 (A. Camus : n° 43)
fuhsingensis Y.T.Chang 1966
Local names si mao qing gang;
Range China (Yunnan), Laos, Vietnam (Annam, district of Djirin) ; 800 - 1700 m ;
Growth habit 5 to 8 m tall;
Leaves 5-8 x 1.5-3 cm; narrowly elliptic to elliptic ; slightly leathery; apex acuminate; base cuneate; margin serrulate towards apical 1/2; green above; bloomy, whitish beneath; 8-10 vein pairs, thin, evident beneath, at an angle of 35° with midrib; petiole pubescent, 5-10 mm long;
Flowers male inflorescences 2-5 cm long; 3 short, free styles;
Fruits acorn ovoid, 0.9-1.3 cm long, 0.7-1 cm in diameter; long stalk (to 4 cm long); enclosed 1/3 by obconic cup; cup 4-6 mm long, 6-10 mm wide, thin (less than 1 mm), silky inside, puberulent outside, with 5-6 concentric rings slightly denticulate ; scar 4-6 mm wide, convex; stylopodium persistent, puberulent; maturing in 2 years;

Bark, twigs and

twigs thin, dark purple, minutely sulcate, with rare, white, small lenticels; bud small, rounded, tomentose;
Hardiness zone, habitat not hardy; in mixed mountain forests;
Miscellaneous -- A. Camus : tome 1, p. 293, n° 50;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Glauca, sub-section Glaucae (Menitsky);
-- Threatened (IUCN Red List Category : EN).

Subspecies and