Oaks of the World

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  Quercus delicatula
Author Chun & Tsiang 1947 J. Arnold Arbor. 28: 324
Synonyms Cyclobalanopsis delicatula (Chun & Tsiang) Y.C.Hsu & H.Wei Jen 1979
Local names shang si qing gang ;
Range China (Guangdong, Guangxi, Hunan), 300 - 700 m ;
Growth habit reaches 13 m high;
Leaves 6-9 x 2-3.5 cm; oblong-elliptic or sometimes oboval-elliptic; chartaceous; base cuneate, apex caudate; margin entire or slightly crenate near apex; 7-8 glabrescent vein pairs, slightly prominent beneath; petiole slender, hairless, 1-2 cm;
Flowers April-May;
Fruits acorn 2 cm long, 1.5 cm wide; ellipsoid; singly or paired; velutinous at least near rounded apex; enclosed 1/3 or 1/2 by cup; cup pubescent both inside and outside, 1.6 cm long, 1.8 cm wide, very thin, with 7-8 concentric rings denticulate near base; scar 5 mm wide; stylopodium persistent; matures in 1 year;

Bark, twigs and

young shoots 2 mm thick, hairless;
Hardiness zone, habitat mixed forests in mountain;
Miscellaneous -- Sub-genus Cerris, Section Cyclobalanopsis;
-- Threatened (IUCN Red List Category : EN)

Subspecies and
Pictures drawing