Oaks of the World

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 Quercus pachyloma
AuthorSeemen 1897
Synonyms Cyclobalanopsis pachyloma (Seemen) Schottky 1912
Cyclobalanopsis pachyloma var. tomentosicupula (Hayata) Liao 1976
tomentosicupula Hayata 1913
conduplicans Chun 1947
gracilenta Chun 1947
picta Hand.-Mazz. 1922
Local namesmao guo qing gang ;
RangeChina (Yunnan, Jiangxi, Hunan, Guangxi, Fujian, Guizhou, Guangdong) ; Taiwan ; 200 - 1000 m ;
Growth habit12-17 m tall;
Leaves 8-10 x 2-4 cm; oboval, oblong-elliptic  or lanceolate; leathery; apex acuminate in apical 1/3, base cuneate; margin toothed in apical half; hairless above; hairy or glabrescent beneath; young leaves densely orangish tomentose; 8-11 vein pairs; tertiary veins evident below; petiole 1.5-2 cm long;
FlowersMarch; pistillate inflorescences tomentose, 1.5-3 cm long, bearing 2-5 cupules;
Fruits acorn 2.5 cm long, 1.4 cm wide, oblong; 2 to 5 together; apex rounded, densely hairy at first; enclosed 1/3 to 2/3 by cup; cup half-round or campanulate, 1.5 mm thick, with 7-8 tomentose, sometimes denticulate, concentric rings; large, persistent stylopodium; maturing in 1 year;

Bark, twigs and
buds

bark grey, smooth; twigs at first orangish tomentose, becoming hairless;
Hardiness zone, habitatnot hardy; in valleys and slopes of wet forests mountains;
Miscellaneous -- A. Camus : n 24;
-- Sub-genus Cyclobalanopsis;
-- Section Semiserrata, sub-section Semiserratae (Menitsky);
-- For Govaerts, 2007, Q. gracilenta and Q. conduplicans are true species, in Guangdong Province.
Subspecies and
varieties
 
Pictures

drawing