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  Quercus planipocula

Trel. 1924 Mem. Natl. Acad. Sci. 20: 136

Diagnosis here

Synonyms planipocula f.subsessileifolia Trel. 1924
Local names encino rosillo;
Range Mexico (Guerrero, Jalisco, Michoacan, Nayarit, Sinaloa); 680-2000 m;
Growth habit 12 (-15) m tall, trunk to 40 cm in diameter;
Leaves 9-20 x 7-10 cm; elliptic to oval; stiff, leathery; apex acute, acuminate, aristate; base rounded, or subcordate; margin thickened, revolute, cartilaginous, crenate or dentate, sometimes entire, with 1-7 pairs of bristle-tips; dark green above, not lustrous, hairless except some short stellate hairs along midvein; yellowish beneath with tomentum made of stellate, short stalked trichomes and golden glandular hairs; 10-15 vein pairs, straight, prominent beneath; epidermis papillose; petiole 0.8-1.8 cm long, pinkish, glabrous or pubescent;
Flowers February to March; male catkins 8.5 cm long, with numerous flowers ; pistillate flowers 1-2 at tip of a tomentose peduncle less than 1.5 cm long;
Fruits acorn 1.5-2 cm long, broadly ovoid; singly or paired; enclosed 1/3 to 1/2 by cup; cup flat, with rim thick and rolled under, with thin, light brown, appressed scales; maturing in 2 years in July-August;

Bark, twigs and

bark blackish, rough, furrowed; twigs 2-3 mm thick, at first densely yellow pubescent (stellate trichomes, sessile or with a short stalk), then glabrescent; inconspicuous lenticels; buds ovoid 3-5 mm long; stipules 3-5 mm long, pubescent, deciduous;
Hardiness zone, habitat not quite hardy (zone 8); prefers deep, well drained, sandy soils;
Miscellaneous -- Sub-genus Quercus, section Lobatae, Series Erythromexicanae;
-- Related to Q.hintonii;

Subspecies and