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Quercus gentryi | |
Author | C.H.Muller 1942 Amer. Midl. Naturalist 27: 474 |
Synonyms | |
Local names | encino 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;
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Bark, twigs and |
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; |
Hardiness zone, habitat | not quite hardy;
prefers poor, rocky soils; |
Miscellaneous | --
A. Camus : n° 407; -- Sub-genus Quercus, section Lobatae; -- Closely related to Q.crassipes but this one differs in having an even, persistent tomentum abaxially; |
Subspecies and varieties | |
Pictures |