Oaks of the World

General dataClassificationsList of speciesLocal namesBack to
home page

 Quercus gentryi
AuthorC.H.Muller 1942
Synonyms 
Local namesencino avellano cimarron; encino chilillo;
Range Mexico (Aguascalientes, Durango, Guanajuato, Jalisco, Michoacan, Nayarit, Sinaloa, Zacatecas); 1000 - 2500 m;
Growth habit 4-6 m tall, trunk to 30-50 cm in diameter;
Leaves

3-10 x 1.5-3.5 cm; deciduous; subcoriaceous; elliptic-lanceolate; apex acute aristate; base acute to, rounded, sometimes oblique; margin entire, never toothed, not rolled under; shiny dark green above, glabrous or with small, scattered stellate and multiradiate trichomes; yellowish green beneath with sparse stellate, fascicled and glandular trichomes, glabrescent; epidermis bullate and papillose; 14-20 vein pairs, short and straight, slightly impressed above; petiole 4-9 mm long, glabrescent;

Flowers in July; staminate catkins 4.5 cm long, with few flowers, pubescent; female catkins very short, bearing 1-3 pubescent flowers;
Fruits acorn 1cm long, broadly ovate; singly or paired, on a peduncle less than 1 cm long; cup half-round 1-1.5 cm in diameter, rolled at rim, with small pale chestnut-brown scales, enclosing 1/2 of nut; maturing in 1 or 2 years, from November to January;

Bark, twigs and
buds

bark coffee-coloured, rough, furrowed, scaly; twigs 1.5-2.5 mm thick, hairless, pinkish grey, becoming hairless; numerous pale yellow lenticels; buds 2-4 mm long, pointed, dark coffee-coloured; stipules sometimes persistent around terminal bud;
Hardiness zone, habitat not quite hardy; prefers poor, rocky soils;
Miscellaneous-- A. Camus : n° 407;
-- Section Lobatae;
-- Closely related to
Q.crassipes but this one differs in having an even, persistent tomentum abaxially;
Subspecies and
varieties
 
Pictures