Oaks of the World

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  Quercus repanda
Author

Bonpl. 1809 Pl. Aequinoct. 2: 31

Diagnosis here
Synonyms lecomteana Trel. 1924 Mem. Natl. Acad. Sci. 20: 81 (A. Camus n° 245) Diagnosis here
revoluta Trel. 1924 Diagnosis here
subtriloba Trel. 1924 Diagnosis here
supranitida C.H.Mull. 1942
Local names
Range Mexico in the Trans-Mexican Volcanic Belt (Hidalgo, San Luis Potosi, Guanajuato, Mexico, Puebla, Queretaro, Tamaulipas, Tlaxcala, Veracruz) ; 1700-3100 m, South of the 22th parallel;
Growth habit very small shrub, 0.3-1.2 m tall, seldom to 2 m;
Leaves

3-8 x 1.5-4 cm; deciduous or semi-evergreen; thick, leathery; distinctly obovate to elliptic-oblong; apex narrowly obtuse, sometimes rounded, mucronate; base rounded attenuate or cuneate; margin thickened, distinctly revolute, cartilaginous, entire, crenate or with 2-3 pairs of mucronate teeth; dull, dark greyish green above, with scattered pubescence made of sessile, 14-16 rayed stellate trichomes, and dark amber glandular (less than 0.05 mm long) hairs; densely, rusty tomentose (not scratchable and masking totally the epidermis) beneath with 16-21-rayed tangled fasciculate trichomes, sessile or shortly pediculate, and reddish glandular hairs; 6-9 vein pairs, straight, with 2-4 pairs of intercalary veins, slightly or not impressed above; epidermis bullate and papillose, reticulate; pétiole 0.3-0.7 cm, blackish, tomentose, glabrescent;

Flowers May; male catkins 0,4-2 cm long, with numerous flowers ;
Fruits acorn 1-1.5 cm long, 1-1.2 cm in diameter; ovoid, sometimes globose; mucronate; singly or paired, on a 1-2.5 cm long tomentose 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-October;

Bark, twigs and
buds

bark grey; twig 1-3 mm thick, pubescent first year, with yellowish lenticels; bud subglobose 2-3 mm; stipules pubescent, persistent;
Hardiness zone, habitat probably hardy;
Miscellaneous -- A. Camus : n° 244 ;
-- Sub-genus Quercus, Section Quercus, Series Leucomexicanae;
-- 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, not masking the epidermis; 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.
-- This taxon is a member of the Q. microphylla complex (Valencia 2020) composed of Q. cordifolia, Q. deliquescens, Q. frutex, Q. intricata, Q. microphylla, Q. mohriana, Q. repanda and Q. striatula.
Subspecies and
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