Oaks of the World

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  Quercus chapensis
Author Hickel & A.Camus 1923 Bull. Mus. Natl. Hist. Nat. 29: 598 1923.
Synonyms Cyclobalanopsis chapensis (Hick. & A.Camus) Hsu & Wei Jen 1976
Cyclobalanopsis koumeii Hu 1951
Cyclobalanopsis shiangpyungensis Hu 1951
Local names bian guo qing gang ;
Range China (S and SE Yunnan); Vietnam; 1400 - 2000 m;
Growth habit 15-20 m ; reaches 25 m with a trunk to 1,8 m in diametre;
Leaves 12-16(20) x 3-5 cm; oblong-lanceolate, lanceolate or sub-elliptic; flat, leathery; glabrous and smooth above; adult partialy glabrous, whitish beneath; apex acuminate, base broadly cuneate to almost rounded; margin serrulate on apical 2/3; midrib and 15-20 lateral veins prominent beneath and slightly raised above, at an angle of 40° with midrib; tertiary veins evident abaxially; petiole 1-2.5 cm, glabrous;
Flowers male catkin hairy 6-7 cm long; pistillate catkin 2-5 mm long;
Fruits acorn 1-2.2 cm high, 1.5-2.7 cm in diameter; brown, weakly mucronate, apex rounded or slightly depressed, scar flat or depressed, 1.5- cm wide; enclosed 1/4 by cup; cup very shallow (0.5-1.2 cm long, 2.5-3.5 cm wide), thick (3-5 mm), silky inside, tomentose outside, with 6-9 concentric rings marginally denticulate; maturing first year;

Bark, twigs and

bark pale greyish; twigs sulcate, villous when young, with long, brownish lenticels;
Hardiness zone, habitat broad-leaved evergreen forests in wet mountain valleys; a little tender; prefers clayey soils;
Miscellaneous -- A. Camus : tome 1, p. 320, n° 62;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Semiserrata, sub-section Chapensis (Menitsky).

-- For The Plant List 2013, it is a synonym of Q. lineata Blume

Subspecies and