General data | Classifications | List of species | Local names | Back
to home page |
Quercus pennivenia | |
Author | Trel. 1924 Mem. Natl. Acad.
Sci. 20:135 1924 diagnosis here |
Synonyms | |
Local names | |
Range | Mexico (E. Sinaloa, SW Durango); 1730-2500 m |
Growth habit | 5-8 m, trunk 15-45 cm in diameter |
Leaves | 15-30 cm x 8-30, suborbicular; apex obtuse-round bristle-tipped; base cordate; margin entire or irregularly toothed, with 1-14 aristae, mostly in the apical part of the blade; adaxially glabrous or with some scattered uniseriate hairs and tomentose on veins and axils; abaxially densely pale grey-brown tomentose, hiding the papillose, somewhat bullate epidermis; 7-10 veins pairs; petiole 1.5-3 cm long, tomentose; |
Flowers | pistillate catkins tomentose, 4-17 cm long, bearing 8-20 acorns clustered at the end; |
Fruits | acorn circa 1 cm long, 0.7-1 cm wide, ovoid, 1/3 enclosed in a 0.8-1 cm wide cup; |
Bark, twigs and |
bark of first year twig greyish-yellow tomentose, older twig hairles and grey to black-purple; bud 3-9 mmn ovoid, villose; |
Hardiness zone, habitat | mineralized, sterile soils in oak-pine forests; |
Miscellaneous |
-- Sub-genus Quercus, Section Lobatae, Series Erythromexicanae,
Group Racemiflorare (with Q. urbanii, Q. conzatii, Q. tarahumara,
Q. radiata and Q. huicholensis); |
Subspecies and varieties |
|
Pictures |
|