Quercus baldoquinae Trel. 1924

Twigs rather slender (2-3 mm.), fluted, glabrous, slightly glaucous, buff with
small prominent lenticels. Buds dull brown, glabrate, rounded, about 2 mm. in
diameter. Leaves deciduous ?, elliptical-obovate or broadly oblong, very obtuse,
shallowly cordate, low-undulate or repand-crenate, moderate (3-5 x 7-12, or
exceptionally 11 x 18 cm.), dull blue-green rather than glaucous, glabrous; veins
about 8-10 pairs, obscurely looped, finely raised on both faces; petiole glabrous,
or stellate-fleecy above, scarcely 3 mm. long. Catkins?. Fruit annual, sessile or several
along or at the end of a glabrate peduncle as much as 50 mm. long; cup halfround,
moderate (12-15 mm. in diameter), with slightly thickened appressed acute hoary or
red-tipped scales; acorn ovoid, 15 mm. long, half-immersed.
Western Sierra Madre region of Mexico.