| Quercus coahuilensis | |
| Author | K.C.Nixon & C.H.Muller 1993 Brittonia 45: 150 1993. |
| Synonyms | hypoxantha auctores, not Trel. 1924 |
| Local names | |
| Range | Mexico
(Coahuila, Chihuahua); |
| Growth habit | may
sometimes reach more than 5-6 m tall; |
| Leaves | 2-6
cm long, 1-3 wide; persistent 2 years; leathery; obovate or elliptic-oblong;
base cordate or rounded; apex acute or rounded, aristate; margin flat
or slightly revolute, with apically 2-4 pairs of bristle-tipped teeth;
yellowish green, hairless above except along veins; densely tawny tomentose
below (tomentum hardly scratchable, made of fasciate, entangled hairs);
|
| Flowers | staminate
inflorescence 2 cm long, flowers with anthers purple-red becoming
yellow; pistillate inflorescence 1-flowered, rarely 2, on a |
| Fruits | small acorn, most solitary; maturing in 2 years; cup with a short peduncle (3-4 mm), half-round, with smooth, thin, appressed scales ciliate at margins; cotyledons free; |
|
Bark, twigs and |
bark
blackish, fissured; twig slender (1-1.5 mm in diameter) with a grey tomentum,
glabrescent; small bud, ovoid, 3-4 mm long, with slightly pubescent scales
ciliate at margin; |
| Hardiness zone, habitat | hardy; |
| Miscellaneous | --
Sub-genus Quercus, section Lobatae, Series Erythromexicanae; -- Closely related to Q.hypoxantha, with which it forms the "Quercus hypoxantha complex", in association with Q.hintoniorum and Q.miquihuanensis. -- |
| Subspecies and varieties |
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| Pictures |
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