Oaks of the World

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 Quercus crassipes
AuthorHumb. & Bonpl. 1809
Synonymscastanea var. glabrata (Liebm. ex Seem.)Trel.
colimae Trel.1924
confertifolia Humb. & Bonpl. 1809, not Torr.1858
crassipes var. angustifolia Humb. & Bonpl.1809
cuajimalpana Trel. 1924
imbricariaefolia Trel.
malifolia Trel. 1924
mexicana Benth. 1840, not Bonpl. 1809
mexicana f. confertifolia (Bonpl.) Trel. 1924
mexicana var. confertifolia (Bonpl.) Wenz.1884
mexicana f. angustifolia (Bonpl.) Trel. 1924
mexicana f. glabrata Trel. 1924
mexicana var. glabrata Liebm. ex Seem.
mexicana sensu Trel. 1924
obovalifolia E. Fourn. ex Trel.1924 (A. Camus : n 316)
Local namesencino capulincillo;
Range Mexico (Guanajuato, Hidalgo, Jalisco, Mexico, Michoacan, Morelos, Oaxaca, Puebla, Querretaro, Tlaxcala); 2000 to 2800 m; introduced in Great Britain in 1839 by Hartweg;
Growth habit tree or shrub, 4 to 20 m; trunk 0.4-1 m in diameter, sometimes more;
Leaves 2.5-9 cm x 1-3; deciduous or semi-evergreen; leathery; narrowly elliptic, or lanceolate or oblanceolate; base rounded or subcordate; apex acute, aristate; margin very thick, slightly rolled under, entire or sometimes slightly wavy; young leaves with dense, yellowish tomentum both sides (adaxially mainly on midrib); mature leaves dark greyish green adaxially, hairless (except along midrib or only near its base); abaxially with yellowish grey stellate tomentum (5-6 rayed, stalked, spreading trichomes), persistent but less dense in autumn; 10-20 vein pairs, prominent beneath like the midrib, forked before reaching margin; adaxially the midrib is impressed; bullate epidermis; petiole thick, yellowish, tomentose or glabrescent, 2-10 mm long.
Flowers in May; staminate carkins 2.5-4.5 cm long, bearing 15-20 flowers with 5 stamens 3 mm long, and apiculate anthers; pistillate flowers 1-2 on a short peduncle 1-1.5 cm long;
Fruits acorn 1-2 cm long, ovoid, hairless except at the mucronate apex; singly or paired on a 5-8 mm long peduncle, thicker than the twig that bears it; cup half-round or conical, enclosing 1/3 to 1/2 of nut, with rim often rolled inside or at least thickened, with thin, slightly tomentose scales triangular at apex; maturing in 2 years, from September to November;

Bark, twigs and
buds

bark dark grey, fissured and scaly; twig slender (1-2 mm wide), pliable, at first densely yellowish tomentose, then with minute pubescence, round or angled in cross-section, with some pale lenticels; bud ovoid, rounded, hairless, with ciliate scales, 2-5 mm long, with deciduous stipules 4-5 mm long;
Hardiness zone, habitathardy in zone 7; prefers deep, dry soils (not too much);
Miscellaneous-- A.Camus : n° 315;
-- Section Lobatae;
-- Related to Q.gentryi;
-- For some Authors, it is a synonym of Q.mexicana Bonpl. but not for Govaerts & Frodin who think it is a true species (just as Susana Valencia-Avalos, 2004, who nevertheless places Q.malifolia in synonymy with both Q.crassipes and Q.mexicana...!), but a confusion is possible as Q. mexicana Benth.1840, not Bonpl. 1809 is a real synonym of Q. crassipes...
Subspecies and
varieties
 
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