| Quercus praeco | |
| Author |
Trel. 1924 Mem. Natl. Acad. Sci. 20: 88 Diagnosis here |
| Synonyms | |
| Local names | encino de asta ; |
| Range | Mexico (Durango,
Sinaloa, San Luis Potosi, Querétaro, Jalisco, Nayarit, Zacatecas)
; 1700-2600 m ; |
| Growth habit | 3-9 m tall,
trunk to 40 cm in diameter; spreading crown; |
| Leaves | 4-10 x 2-6 cm; late deciduous; subcoriaceous; oblong-oboval, oblong-elliptic to oboval; apex rounded or sometimes subacute; base rounded or subcordate; margin flat or revolute, lobed with short mucros, or sinuate-dentate with 4-7 pairs of short, blunt teeth; lustrous green above, often covered with stellate and fascicled hairs; dense whitish-grey tomentum beneath, made of the same types of trichomes as adaxially, hiding totally the epidermis; secondary veins 7-12 pairs, mostly flat adaxially, or remotely impressed, prominent beneath; epidermis pale green, papillose, seldom bullate ; petiole tomentose 0.3-1 cm long; |
| Flowers | male catkins
6 cm long, with hairy axis; pistillate flowers 1-5 on a 3-7 cm long stalk;
|
| Fruits | acorn 1.7-2
cm; ovoid; in clusters on a strong peduncle to 8 cm long; enclosed 1/2
by cup; cup campanulate, 1.5-2.5 cm in diameter, margin strongly rolled
inside; maturing in 1 year; |
|
Bark, twigs and |
bark
fissured; twig 2-4 mm thick, yellowish white tomentose; buds 2-4 mm long,
ovoid, obtuse, tomentose; |
| Hardiness zone, habitat | not
quite hardy in zone 7; prefers dry, rocky soils; |
| Miscellaneous | --
A. Camus : n° 186, with Q. arizonica; -- Sub-genus Quercus, Section Quercus, Series Leucomexicanae; |
| Subspecies and varieties |
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| Pictures |
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