Oaks of the World

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  Quercus tinkhamii
Author C.H.Muller 1942
Synonyms  
Local names  
Range Mexico (San Luis Potosi, Nuevo Leon, Zacatecas); 1700-2200 m;
Growth habit 3 metres tall;
Leaves

2-5 x 0.7-2 cm; deciduous; subleathery; oblong or oblong-elliptic; apex acute to obtuse, with dark mucro; base obtuse; margin thickened, flat, slightly undulate, mostly entire or with 1-2 pairs of mucronate teeth; adaxially green, lustrous, hairless or glabrescent with some scattered glandular hairs and stalkless, stellate ones at base of midvein; abaxially green, lustrous, with scattered stalkless stellate trichomes and most often glandular ones; 6-8 vein pairs not or very slightly impressed above; epidermis smooth, papillose; petiole 2-4 mm long, pubescent;

Flowers in July; male catkins 2 cm long, few-flowered; female ones 0.5 cm, with 1-2 pubescent flowers;
Fruits acorn 1-1.5 mm long, ovoid, singly or paired; stalkless or on a 5 mm long peduncle; cup half-round, with straight rim, 1-1.2 cm wide, with pubescent scales, enclosing 1/3 or 1/2 of the nut; maturing same year, in October;

Bark, twigs and
buds

bark grey, scaly; twig grey, 1-2 mm in diameter, pubescent with stalkless, stellate trichomes and glandular ones, persistent more than 1 year; bud reddish, 2-3 mm long; stipules short, pubescent, deciduous;

Hardiness zone, habitat  
Miscellaneous -- Section Quercus;
-- Endangered species;
Subspecies and
varieties
 
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