Oaks of the World

General dataClassificationsList of speciesLocal namesBack to
home page

 Quercus repanda
Author

Bonpl. 1809 Pl. Aequinoct. 2: 31

Diagnosis here

Synonyms lecomteana Trel. 1924 Mem. Natl. Acad. Sci. 20: 81
revoluta Trel. 1924 Diagnosis here
subtriloba Trel. 1924 Diagnosis here
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 ;
-- Sub-genus Quercus, 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