Oaks of the World

General data Classifications List of species Local names Back to
home page

  Quercus tinkhamii
Author C.H.Muller 1942
Local names  
Range Mexico (Chihuahua, Hidalgo, San Luis Potosi, Nuevo Leon, Tamaulipas); 1400 m;
Growth habit 1.5-3 metres tall;

2-5 x 0.7-2 cm; deciduous; subleathery; oblong or elliptic; apex acute to obtuse, with dark mucro; base obtuse to subcordate; margin thickened, not revolute, slightly undulate, entire or mostly with 2-6 pairs of mucronate teeth except near the base; adaxially green, lustrous, hairless or glabrescent with some scattered glandular hairs and stalkless, stellate ones at base of midvein; abaxially green, pubescent to glabrescent, with not appressed stellate trichomes, and most often glandular ones; 6-8 vein pairs not or very slightly impressed above, raised beneath; epidermis papillose; petiole 2-7 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 2-3 together; stalkless or on a 2-5 mm long peduncle; cup half-round, with straight rim, 1-1.2 cm wide, with pubescent scales, enclosing 1/3 or 1/4 of the nut; maturing same year, in September-October;

Bark, twigs and

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;
-- Possible confusion with Q. sebifera which is also a low shrub; but sebifera has oboval, oblanceolate to elliptic leaves, with 4-7 pairs of secondary veins, and the abaxial side is glabrous, glaucous and bloomy.
-- May be confused as well with Q. vaseyana;
Subspecies and