Oaks of the World

General dataClassificationsList of speciesLocal namesBack to
home page

 Quercus glabrescens
AuthorBenth. 1840
Synonymsglabrescens var. integrifolia Liebm. 1864
Local namesquebracho;
Range Mexico (Oaxaca, San Luis Potosi, Hidalgo, Mexico, Tlaxcala, Puebla, Veracruz); 2500-3400 m; introduced in England by Hartweg in 1839;
Growth habit 3-4 m tall usually, but may reach to 20 m;
Leaves 4-11 x 1.5-5 cm; deciduous; stiff, leathery; oblanceolate, elliptic or oboval; apex acute; base obtuse sometimes cordate; margin thick, cartilaginous, very slightly rolled under, crenate or dentate with apically 3-5 pairs of mucronate teeth; shiny dark green, rough and glabrescent above (with few glandular hairs on midrib, and sessile stellate ones); paler beneath, glabrous or with some stellate, sessile or short pediculate hairs); 10-14 rather straight vein pairs; epidermis lustrous, smooth to papillose, sometimes scarcely ampulate, with prominent veins ; petiole 3-10 mm long, covered with sessile stellate hairs;
Flowers in February; staminate catkins 2 cm long, with 20-30 flowers; pistillate catkins 1-1.8 cm long, 1 to 3-flowered, with glabrescent rachis;
Fruits acorn mucronate, ovoid, 1.6 cm long, 1.3 cm in diameter; solitary or 2 to 3, sessile or on a glabrous, 4-5 mm long stalk; enclosed 1/3 by cup; cup brown tomentose, 1-2 cm in diameter, without warty scales; maturing first year in September;

Bark, twigs and
buds

grey bark peeling into square, thin plates; twigs 1-2.5 mm wide, scarcely pubescent, coffee-coloured with evident pale yellow lenticels; bud ovoid to round, 2.5-3 mm long, glabrous or remotely pubescent near base, with ciliate along margin, oval scales; stipules 7 mm long, glabrescent, persistent on terminal bud;
Hardiness zone, habitathardy; all types of soils, prefers moist ones; cultivated in Holland; slow growing;
Miscellaneous-- A. Camus : n 211;
-- Section Quercus;
Subspecies and
varieties
var. radlkoferiana (Trel.) A.Camus 1935   (A. Camus : n 212)
= Quercus radlkoferiana Trel. 1924
less than 3 m tall; Oaxaca, Mexico, Veracruz; for today's Mexican Authors (S. Valencia-A. 2004) and for Govaerts 2007, it is a synonym of Q.glabrescens.
Pictures