Quercus emoryi Torr.

West Texas to Central Arizona; Mexico (Baja California, Chihuahua, Coahuila, Durango, Nuevo Leon, San Luis Potosi, Sonora, Tamaulipas); 1200-2000 m;

2-5 m high, but may reach sometimes 15 m on favourable soils;

2.5-6 x 1-2 cm; subpersistent; thick, stiff; leathery; narrowly oblong, sometimes oboval or oval; apex acute or obtuse, aristate; base subcordate to truncate, less often obtuse, seldom rounded asymmetrical; margin flat, entire or with 1-5 pairs of small aristate teeth; lustrous above, glabrous or with sometimes some sessile fascicled trichomes, essentially at the base of the midrib; less lustrous beneath, hairless or with axil tufts of stipitate fascicled hairs and glandular trichomes somewhat golden; 4-8 vein pairs, not evident; tertiary veins prominent; epidermis slightly bullate and white papillose; petiole pubescent, 3-7 mm long;

flowers appear in April-May; male catkins 1-3 cm long, with 1-2 flowers 4-staminate; female inflorescence pubescent, very short, with a lonely flower;

acorn 1.2-1.9 cm, narrow; solitary; cup sessile (or with a very short peduncle to 2 mm), enclosing 1/3 of nut, pubescent inside, with thin, smooth, appressed scales; edible since a little bitter; maturing first year in June - September;

hardy zone 6; all types of soils if dry rocky ones; slow growing;

– A. Camus : n° 388; – Sub-genus Quercus, section Lobatae, Series Erythromexicanae, Group Vimineae; – Discovered by William H. Emory (U.S.A. 1811-1887 ) – Hybridizes with Q.graciliformis (= Q.x tharpii C.H.Muller), Q. hypoleucoides , and with Q.gravesii (= Q.x robusta );