Quercus viminea Trel.

South Arizona; Mexico (Durango, Sinaloa, Jalisco, Nayarit, Aguascalientes, Chihuahua, Sonora); 1500 to 2100 m;

reaches 10 m tall, with trunk to 0.3 m in diameter;

3.5-12 x 0.7-1.5 cm; semi-evergreen; leathery; narrowly lanceolate, fusiform; apex acuminate, aristate; base rounded or cordate, often oblique; margin remotely thickened, not revolute, entire or with 1-3 asymmetrical pairs of aristate teeth in apical 1/3; adaxially light green, lustrous, almost hairless except some scattered multiradiate and uniseriate glandular trichomes; abaxially yellowish, with stipitate fascicled hairs (mostly at axils), and numerous golden glandular trichomes; 9-12 vein pairs flat adaxially, raised underneath; epidermis papillose; petiole 6-15 mm, pubescent becoming hairless;

in January; male catkins 5-6 cm long, hairy, bearing numerous flowers; pistillate flowers hairy, 1 to 3 together at tip of a thick, short peduncle;

acorn 1-1.5 cm long, ellipsoid or ovoid; singly or paired on a 4-5 mm long peduncle; enclosed 1/3 or more by cup; cup half-round, with straight rim, 8-11 mm in diameter, with appressed, pubescent, rounded scales; maturing in 2 years from May to July;

not quite hardy;

– A.Camus : n° 299; – Sub-genus Quercus, section Lobatae, Series Erythromexicanae; – The Mexican species Q.bolanyosensis Trel. is sometimes considered as a true species (diagnosis here );