Oaks of the World

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 Quercus laeta
AuthorLiebm. 1854
Synonymscentralis Trel. 1924
clivicola Trel. & C.H.Muller 1936     (A. Camus : 206)
laeta f. heterophylla Trel. 1924
obscura Trel. 1924, nom. illeg., not Seem. 1897
pallescens Trel. 1924
pandurata var. laeta (Liebm.) Wenz. 1884
prinopsis Trel.1924    (A. Camus : 230)
transmontana Trel. 1924 (A. Camus = n° 252)
Local namesencino algodoncillo; encino colorado;
Range Mexico (Aguascalientes, Coahuila, Durango, Guanajuato, Hidalgo, Jalisco, Mexico, Michoacan, Nayarit, Nuevo Leon, Sinaloa, San Luis Potosi, Zacatecas); 1000 - 2700 m;
Growth habit2-10 m tall, trunk 25-40 cm wide; sometimes shrub to 60 cm high; crown broad; branches twisted, spreading;
Leaves 5-15 x 2-6 cm; deciduous; thick, leathery, stiff; elliptic or oblong, sometimes oblong-oboval; apex obtuse, round, or acute mucronate; base rounded or cordate; margin thick, plane, entire or with 2-7 pairs of mucronate teeth; lustrous olive green, shiny above, nearly glabrous or with 9 rayed fascicled trichomes on the whole surface and simple uniseriate glandular trichomes along midrib, especially the base; paler, glaucous beneath, with an even indumentum made of 9 rayed, stellate hairs (with or without a short pedicel), sometimes showing rare glandular hairs on veins, without masses of glandular secretions; 7-12 vein pairs impressed above, prominent beneath; epidermis papillose, sometimes slightly bullate ; petiole pubescent 2-8 cm long;
Flowers flowering in May; male catkins 4-6 cm long, with numerous flowers; female ones 1-3 cm long, with 1 to 3 pubescent flowers;
Fruits acorn ovoid, 0.8-1.8 cm long, 0.6-1.4 cm in diameter; singly or to 3 on a short peduncle less than 5 cm long; apex obtuse, mucronate; enclosed 1/3 or 1/2 by cup; cup 1-1.5 cm in diameter, with scales narrowed at apex and thickened at base; maturing in 1 year, from September to December;

Bark, twigs and
buds

dark bark; twigs pinkish tawny, hairy, grooved, with pale yellow lenticels; bud ovoid, obtuse, 2-3 cm long; stipules hairy, deciduous, 4-6 mm long;
Hardiness zone, habitathardy; prefers dry, rocky soils;
Miscellaneous -- A. Camus : n° 232 ;
-- Section Quercus;
-- related to
Q.obtusata with which it hybridizes frequently; Q. laeta differs from Q. obtusata whicb has the foliar underside pale green with abundant glandular hairs and glandula secretions, and a foliar margin never entire.
Subspecies and
varieties
 
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