| General data | Classifications | List of species | Local names | Back to home page |
| Quercus x undata | |
| Author |
Trel. 1924 Mem. Natl. Acad. Sci. 20: 86 Diagnosis here |
| Synonyms | hybrid between Q. chihuahuensis and Q. grisea or Q. arizonica |
| Local names | |
| Range | Mexico, in the Sierra Madre Occidental (Chihuahua, Durango); 2000 - 2800 m ; |
| Growth habit | shrub, no more than 3-4 metres tall; |
| Leaves | 3-6 cm x 1-4; thick, leathery; elliptic; apex acute more or less broadly, seldom obtuse or rounded, mucronate; base obuse, rounded or cordate; margin entire or slightly dentate near apex, crispate, more or less revolute; adaxially greyish green, more or less densely tomentose; abaxially glaucous green, densely tomentose (sometimes moderately) with variable stellate trichomes; midrib with a yellow pubescence; 10-12 vein pairs impressed above; petiole 2-6 mm, thin, stellate tomentose; |
| Flowers | male catkins 3 cm, woolly; loosy flowered, with anther glabrous and round. |
| Fruits | acorn 1 cm in diameter, ellipsoid, 2-3 on a 6-10 cm long peduncle; |
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Bark, twigs and |
twig 3 mm thick, densely yellowish-brown tomentose; bud brown, broadly obovoid, densely hairy, sometimes hairless. |
| Hardiness zone, habitat | |
| Miscellaneous | --
Sub-genus Quercus, Section Quercus, Series Leucomexicanae; -- The morphological characters are between those of the parents; however Q. x undata is closer to Q.chihuahuensis |
| Subspecies and varieties |
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| Pictures |