Quercus toumeyi Sarg.

USA (South Arizona, West Texas, New-Mexico); Mexico (Sonora, Chihuahua); 1500-2400 m;

usually shrubby, 2-3 m tall; numerous spreading branches;

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;

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;

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;

hardy; all types of soils; prefers dry rocky slopes;

– 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;