Oaks of the World

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  Quercus augustini
Author Skan 1899
Synonyms Cyclobalanopsis augustini (Skan) Schottky 1912
augustini var. angustifolia A.Camus 1933
augustini var. rockiana A.Camus 1935
augustini var. genuina A.Camus 1935 nom. inval.
glabricupula Barnett 1938
Pasania chiwui Hu
Local names zhai ye qing gang ;
Range China (Yunnan, Guizhou, Guangxi) ; Vietnam ; Northeast Myanmar; Thailand ; from 1200 m to 2700 m;
Growth habit 1.5-3 m, but reaches sometimes 10 m;
Leaves 7-12 cm long, 1-4 cm wide; evergreen; oval-lanceolate to elliptic-lanceolate; apex acuminate, base cuneate and oblique; margin mostly entire, or more or less slightly toothed near apex; glabrous, shiny above; somewhat farinose or glaucescent, glaucous below; midrib not impressed above; 10-15 pairs of secondary veins; petiole glabrous, 0.5-2 cm long;
Flowers pistillate inflorescences solitary, 3-4 cm long, at axils of young shoots; flowers in April-May; 3 styles;
Fruits acorn oblong-ovoid, 1-1.7 cm long, 0.8-1.2 cm wide, glabrous, apically rounded and sometimes depressed; enclosed for 1/2 in cupule; cupule 0.6-1 cm long, 1-1.3 cm wide, outside glabrous or nearly so, sericeous inside, with 5-7 concentric rings entire or crenate; scar slightly convex; stylopodium persistent; maturing in 2 years;

Bark, twigs and
buds

dark grey bark; twigs sulcate, with orangish brown scalelike acorns first, becoming glabrous;
Hardiness zone, habitat not quite hardy; all types of soils; cultivated in Great Britain;
Miscellaneous -- A. Camus : n 23;
-- Subgenus Cyclobalanopsis; Section Cyclobalanoides (Menitsky).
-- Also written "augustinii" ;
Subspecies and
varieties
-- Cyclobalanopsis augustini var. negrinux : see Q. chevalieri ;
Pictures

drawing 1