| Quercus toumeyi | |
| Author | Sarg. 1895 Gard. & Forest 8: 92 |
| Synonyms | hartmanii
Trel. 1924 |
| Local names | Toumey's
oak; |
| Range | USA (South Arizona, West Texas, New-Mexico); Mexico (Sonora, Chihuahua); 1500-2400 m; |
| Growth habit | usually shrubby, 2-3 m tall; numerous spreading branches; |
| Leaves | 1.2-3
x 0.6-1.5 cm; deciduous or subevergreen; leathery; elliptic or oblong-elliptic,
sometimes oval; apex acute or obtuse, mucronate; base rounded or remotely
cordate, seldom cuneate; margin flat, cartilaginous, mostly entire, or
with sometimes 2-4 pairs of mucronate teeth towards apex; lustrous above,
hairless or sometimes with scattered stellate hairs, mostly at base of
midrib; dull beneath with sessile, 4-14 rayed stellate hairs and white
glandular ones; 5-8 vein pairs; epidermis smooth, papillose; petiole 1-4
mm long, hairy, reddish; |
| Flowers |
April to June; male catkins 2 cm long; female catkins 0.5-0.7 cm long, with 1-3 flowers, sessile or on a 2-5 mm long stalk; |
| Fruits | acorn
1.2-1.5 cm long; oblong; cup subsessile, shallow, enclosing 1/3 of nut,
with slightly warty, pubescent scales; maturing in 1 year from August
to October; |
|
Bark, twigs and |
bark
thin, rough, scaly, fissured, dark grey; young twigs 1-2 mm thick, hairy,
smooth, red brown; older twigs rough, grey to blackish; buds red brown,
ovoid, 0.5-1 mm long; |
| Hardiness zone, habitat | hardy;
all types of soils; prefers dry rocky slopes; |
| Miscellaneous | --
A. Camus : n° 182; -- Sub-genus Quercus, Section Quercus, Series Leucomexicanae; -- Discovered in 1894 by James Toumey (1865-1932), American botanist and forester; -- Young plants, with spiny margin leaves, may be confused with Q.turbinella, but the latter has 10-40 mm long acorn stalk, and leaves with some tufts of flattened hairs beneath; |
| Subspecies and varieties |
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| Pictures |
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