| Quercus pungens | |
| Author |
Liebm. 1854 Overs. Kongel. Danske Vidensk. Selsk. Forh. Medlemmers Arbeider 1854: 171 Diagnosis here |
| 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; |
| 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 stalkless, 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, Series Polymorphae; -- Numerous forms intermediate between Q.pungens and Q.vaseyana; |
| Subspecies and varieties |
Q.vaseyana Buckl. : see this
name |
| Pictures |
|
