Quercus macdougallii Martinez

Mexico (Oaxaca); 2800 to 3000 m;

20-25 m tall; trunk to 1 m in diameter;

2-6 x 1-3.5 cm ; deciduous; leathery; oblong elliptic; apex acute or obtuse, mucronate; base rounded, sometimes subcordate or asymmetrical; margin thick, slightly revolute, cartilaginous, entire or with 1-3 pairs of mucronate teeth ; shiny, smooth above with some hairs along midrib; abaxially yellowish green, densely covered with short (hardly visible), adpressed, stellate hairs, and with long simple hairs along midrib; 6-10 vein pairs, stongly impressed above, prominent beneath; epidermis smooth, papillose; petiole sulcate, pinkish, slightly pubescent or smooth, 4 mm long;

from May to June; female inflorescences bearing at least 4 flowers;

acorn globose, 1.5-1.7 cm in diameter; sessile; 3 to 4 together; coffee-coloured; smooth, shiny; cup hemispherical 1.5 cm in diameter, with oval, glaucous tomentose scales; ripening first year in October-November;

hardy;

– Sub-genus Quercus, Section Quercus, Series Leucomexicanae; – Poorly known species from Oaxaca (Sierra de Juarez), not widespreading but not protected; – Threatened (IUCN Red List Category : EN).