Oaks of the World

General data Classifications List of species Local names Back to
home page

  Quercus pungens
Author Liebm. 1854
Synonyms undulata Torr. var. pungens (Liebm.) Engelm. 1877
undulata var. wrightii Engelm. 1876
Local names pungent oak ; sandpaper oak ;
Range C Texas; SE Arizona; New-Mexico; Mexico (Coahuila, Chihuahua, Guanajuato); 800 to 2000 m;
Growth habit not exceeding 5 m tall; often bushy, 0.2-1 m; thicket forming;
Leaves 2-4 (-6) x 1.5-3 cm; evergreen; stiff, thick, rough; elliptic or oblong; apex obtuse or acute; base rounded or seldom acute, sometimes asymmetrical; margin thickened, wavy, mostly with 1-8 pairs of mucronate, pungent teeth, sometimes crenate; glaucous to yellowish green, shiny above, with scattered, small, sessile, stellate hairs, mainly at base of midvein, glabrescent; dull beneath, densely tomentose with small, scattered stellate hairs and simple hairs on midvein; 7-11 vein pairs more evident beneath; epidermis slightly bullate, papillose; petiole 3-6 mm long, slightly hairy;
Flowers in May; male catkins 0.5-2 cm long, with more than 10 flowers; pistillate ones with 1-3 pubescent flowers;
Fruits acorn 1-1.2 cm long; oblong; singly or paired; subsessile or with a short stalk 3 mm long; cup shallow enclosing 1/3 to 1/2 of nut; maturing in 1 year in September;

Bark, twigs and

bark grey brown, broken into rough plates; young twigs reddish or yellowish, with numerous stalkles; stellate hairs; buds brown, 1.5-2 mm long; stipules pubescent, deciduous, 3-4 mm long;

Hardiness zone, habitat hardy (withstands -15° C); prefers dry soils, even calcareous ones;
Miscellaneous -- A. Camus : n° 215;
-- Sub-genus Quercus, Section Quercus ;
-- numerous forms intermediate between Q.pungens and Q.vaseyana;
Subspecies and
Q.vaseyana Buckl. : see this name