Oaks of the World

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 Quercus pringlei
Author Seemen ex Loes. 1900 Bot. Jahrb. Syst. 29: 96
Synonyms filiformis C.H.Mull. 1936
Local names 
Range Mexico (Nuevo Leon, Queretaro, Coahuila, Hidalgo, San Luis Potosi, Tamaulipas, Zacatecas) ; 1000-3000 m;
Growth habit usually less than 2 m tall, but reaches 3 m;
Leaves 1.6-3(-4) cm long, 0.5-1.3 wide; evergreen; semi-leathery; elliptic or oblong, seldom lanceolate; apex mucronate, obtuse; base rounded; margin thick, flat, cartilaginous, entire or seldom with 1-3 pairs of small, mucronate teeth in apical 2/3; lustrous green, glabrous above; beneath with stellate pubescence at first near base, along with long, simple glandular hairs, then glabrous and often pale glaucous; 6-9 straight vein pairs nearly plane both sides, not conspicuous; epidermis smooth ; petiole 2-5 mm long, with short pubescence;
Flowers in March-April; male catkins 1-3 cm long, with numerous flowers with 5-6 stamens; female catkins pubescent, 2-4 mm long, with 1-3 flowers;
Fruits acorn ovoid or globose 1-1.2 cm; singly or paired, sessile or on a very short peduncle less than 10 mm long; cup half-round, 9-12 mm in diameter, enclosing 1/3 or 1/4 of nut, with pubescent scales; maturing in 1 year in September;

Bark, twigs and
buds

bark thin, fissured; twig slender (1-2 mm in diameter), with dense, glabrescent tomentum made of stalkless, stellate hairs, simple hairs and dark glandular ones; bud 1-2 mm, almost globose, reddish; stipules hairless, 4 mm long, deciduous;  

Hardiness zone, habitat hardy zone 7;
Miscellaneous -- A. Camus : n° 177;
-- Sub-genus Quercus, Section Quercus ; sub-section Opacae;
-- related to
Q.grisea ;
-- resembles sometimes Q. depressipes, but the leaves of this species are dull, glaucous, oblong-oboval to nearly orbicular, and the peduncles are longer (1.5-3.5 cm);
Subspecies and
varieties
-- fo. dentata C.H.Muller 1936
margin dentate except in lower 1/3, teeth with recurved mucro; leaves abaxially yellowish stellate tomentose at first, becoming glabrous;
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