Oaks of the World

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 Quercus repanda
Author Bonpl. 1809
Synonyms lecomteana Trel. 1924
revoluta Trel. 1924
subtriloba Trel. 1924
supranitida C.H.Mull. 1942
Local names 
Range Mexico (Hidalgo, San Luis Potosi, Guanajuato, Mexico, Puebla, Queretaro, Tamaulipas, Tlaxcala, Veracruz) ; 1700-2300 m, South of the 22th parallel;
Growth habit very small shrub, 0.3-1.2 m tall;
Leaves 3-8 x 1.5-4.5 cm; deciduous or semi-evergreen; oblong-oboval or elliptic-oblong; thick, leathery; apex obtuse, sometimes rounded, mucronate; base rounded; margin thickened, revolute, cartilaginous, crenate orwith1-5 pairs of mucronate teeth; shiny dark greyish green above, with scattered pubescence made of sessile, 14-16 rayed fascicled trichomes, and dark glandular (less than 0.05 mm long) hairs; densely, rusty tomentose (not scratchable and masking totally the epidermis) beneath with 16-21-rayed tangled trichomes, sessile or shortly pediculate, and reddish glandular hairs; 7-10 vein pairs, straight, with 2-4 pairs of intercalary veins, slightly or not impressed above; epidermis bullate and papillose, reticulate; pétiole 0.2-0.5 cm, blackish, tomentose, glabrescent;
Flowers June-July; male catkins 0,4-2 cm long, with numerous flowers ;
Fruits acorn 1-1.5 cm long, 1-1.2 cm in diameter; sometimes globose; mucronate; singly or paired or to 6, on a 5-15 mm long peduncle; enclosed 1/2 or 1/3 by the cup; cup 10-13 mm in diameter, with thin, tomentose, reddish-tipped scales; maturing in 1 year in September;

Bark, twigs and
buds

bark grey; twig 1-3 mm thick, pubescent first year, with yellowish lenticels; bud subglobose 2-4 mm; stipules pubescent, persistent;
Hardiness zone, habitatprobably hardy;
Miscellaneous-- A. Camus : n° 244 ;
-- Section Quercus ;
-- closely related to
Q.microphylla, but microphylla is deciduous, its leaves are shorter, and foliar trichomes have less than 15 rays;
-- resembles Q. frutex, trichomes of which have only 5-9 rays and which has a less dense foliar tomentum beneath; resembles also Q. greggii, but this species has the lateral veins strongly impressed above, and his range is at 2700-3200 m in the North of the 24th parallel.
Subspecies and
varieties
 
Pictures