| Quercus tarahumara | |
| Author | Spellenb., J.D.Bacon & Breedlove 1995 Madroņo 42: 28 |
| Synonyms |
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| Local names | |
| Range | Mexico,
in the North of the Sierra Madre Occidental (NE Sinaloa, NW Durango, NE
Sonora, W Chihuahua); |
| Growth habit | reaches 12 metres tall; |
| Leaves | 8-25
cm x10-20; broadly oboval to almost rounded; convex, thick, leathery;
apex rounded or obtuse, aristate; base obtuse to heart-shaped; margin
thick, revolute, cartilaginous, entire or dentate, with 4-18 pairs of
small aristate teeth; dull olive green above, almost glabrous, with some
stalked, stellate hairs along midvein; densely yellowish tomentose beneath
with numerous golden glandular hairs and stalked stellate hairs mixed;
7-11 vein pairs; epidermis smooth, papillose; petiole hairy 1.5-6 cm long;
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| Flowers | in February; male catkins 10-20 cm long, with numerous flowers; pistillate inflorescences 1 cm long, few-flowered; |
| Fruits | acorn
ovoid, 0.8-1.4 cm long; solitary or paired on a peduncle less than 1 cm
long; cup half-round, 1 cm in diameter, slightly hairy, enclosing 1/3
of nut; maturing in 1 year in June; |
|
Bark, twigs and |
bark
fissured, greyish; twig stout, 5-10 mm thick, golden, with persistent
tomentum made of stalked, stellate hairs; small pale lenticels; bud 6-10
mm long, reddish, with pubescent scales; |
| Hardiness zone, habitat | not hardy; |
| Miscellaneous |
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Sub-genus Quercus, section Lobatae, Series Erythromexicanae, Group Racemiflorae;
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| Subspecies and varieties |
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| Pictures |
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