Oaks of the World

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  Quercus guyavaefolia
Author H.Lév. 1913 Repert. Spec. Nov. Regni Veg. 12: 363
Synonyms pannosa Hand.-Mazz.1929 (A. Camus : n 90)
pileata Hu et W.C.Cheng 1951
semecarpifolia Franchet p.p.
Local names mao dou li
Range China (Yunnan, Sichuan ) ; 2500 to 4000 m ;
Growth habit brittle shrub, evergreen, 0.6 m to 2m, or tree reaching 15 m according to elevation;
Leaves 3.5-8 x 3.5 cm; evergreen; thick and leathery; subelliptic; obtuse or rounded at apex; base rounded or cordate; margin revolute, entire, or toothed with 2 mm long spiny teeth; glabrous above except some multiradiate hairs; dense, tawny, persistent tomentum beneath made of simple, solitary and fascicled hairs; 5-12 vein pairs not densely covered with hairs, at an angle of 50-52° with midrib; petiole 2-4 mm, brown tomentose;
Flowers May to July; female inflorescences 2-6 cm, tomentose, multiflowered; male catkin 4-5 cm, tomentose;
Fruits acorn 1.8 cm long, 1.3-1.4 cm in diameter; subglobose; glabrous; apex rounded; singly or paired, on a 2-6 cm long peduncle ; enclosed 1/2 by cup; cup adherent to nut only at base; scales less than 4 mm long, grey brown tomentose from their base to middle, glabrous and red brown at their tip; maturing in 2 years;

Bark, twigs and
buds

twig reddish to dark brown tomentose, becoming more or less quickly hairless; bud ovoid, brownish; lenticels whitish; stipules linear deciduous;
Hardiness zone, habitat hardy; mountain forests;
Miscellaneous -- A. Camus : tome 1, p. 380, n° 88;
-- Sub-genus Cerris, Section Ilex;
-- Closely related to
Q.semecarpifolia Sm.;
-- Also written "guyavifolia" or "guajavifolia";
-- See the Key for similar Asian Quercus

Subspecies and
varieties
 
Pictures

drawing 1
drawing 2