Oaks of the World

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 Quercus viminea
AuthorTrel. 1924
Synonymsbolanyosensis Trel. 1924
Local namesencino sauce;
Range South Arizona; Mexico (Durango, Sinaloa, Jalisco, Nayarit, Aguascalientes, Chihuahua, Sonora); 1500 to 2100 m;
Growth habitreaches 10 m tall, with trunk to 0.3 m in diameter;
Leaves 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;
Flowers 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;
Fruits 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;

Bark, twigs and
buds

bark striated; twigs dark red brown, 2-3 mm thick, glabrescent then glabrous at the end of first year, with numerous raised lenticels; terminal bud brown, ovoid, pointed, hairless, 1.5-3 cm long;
Hardiness zone, habitatnot quite hardy;
Miscellaneous-- A.Camus : n° 299;
-- Section Lobatae;
-- The Mexican species Q.bolanyosensis Trel. is sometimes considered as a true species;
Subspecies and
varieties
 
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