Oaks of the World

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  Quercus crassifolia
Author Humb. & Bonpl. 1809
Synonyms brachystachys Benth. 1842
chicamolensis Trel. 1922    (A. Camus : 306)
errans Trel. 1924
crassifolia var. errans Trel.
felipensis Trel. 1924
mollis Mart. & Gal. 1843, not Raf. 1838
moreliana Trel. 1924
miguelitensis Trel. 1924
orbiculata Trel. 1924
spinulosa Mart. & Gal. 1843
splendens var. pallidior A.DC 1864
stipularis Humb. & Bonpl. 1809
Local names encino chicharron ;
Range Mexico (Chiapas, Guerrero, Guanajuato, Hidalgo, Jalisco, Mexico, Michoacan, Oaxaca, Puebla, Querretaro, San Luis Potosi, Tlaxcala, Veracruz); Guatemala ; 1300 to 2800 m ; introduced in G.B. in 1939 by G. Hinton;
Growth habit 10-15 m, often only 2-3 m; trunk to 0.5 m in diameter;
Leaves 4-16 x 3-10 cm; late deciduous; thick and stiff; oboval or oblong-oboval or elliptic; apex acute, acuminate or obtuse, aristate; base rounded or cordate; margin cartilaginous, revolute and wavy, with 3-8 pairs of sharp bristle-tipped teeth mostly at apical 2/3; yellowish green, shiny, rough and glabrous above except fascicled trichomes along midrib; persistent, woolly, yellowish , orange or light brown tomentum g beneath, made of fascicled hairs 1-1.5 mm long with a stalk 0,2 mm long, easy to remove; 7-9 vein pairs impressed above, prominent abaxially; bullate and papillose epidermis; petiole tomentose 0.6-1.5 cm long; young leaves conspicuously with red glandular trichomes;
Flowers April; staminate catkins tomentose, 10 cm long at least, with 30-40 flowers; pistillate flowers 1 to 3, on a very short, tomentose, 5-8 mm long peduncle;
Fruits acorn ovoid 1-1.5 cm; singly or paired; subsessile or short-stalked 3-9 mm; glabrous, light coffee; enclosed 1/3 by half-round cup; cup with thin, pubescent, apically rounded scales ; matures in 2 years, in October.

Bark, twigs and
buds

bark fissured into square plates, dark grey-brown; twigs dark tawny, 2-5 mm thick, becoming glabrescent, with numerous 3 mm long lenticels; bud 3-7 mm, with tomentose scales; stipules 1 cm long, becoming hairless, rather persistent;
Hardiness zone, habitat hardy(zone 7);
Miscellaneous -- A. Camus : n° 304;
-- Section Lobatae; sub-section Crassifoliae;
-- For Govaerts & Frodin (1998), Q.felipensis Trel. is a true species, in Mexico (Oaxaca), such as Q.chicamolensis and Q.miguelitensis, but not for S. Valencia-Avalos (2004);
-- For Tracey Parker (Trees of Guatemala, 2008), Q. brachystachys is a true species.
Subspecies and
varieties
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