Quercus productipes Trel. 1924
Twigs moderate (3-4 mm.), somewhat fluted, transiently tawny-floccose,
rather dull
redbrown with minute lenticels when denuded. Buds rather glossy brown, from
brown-lanate glabrescent, ovoid, 3 x 4 mm. Leaves deciduous, elliptical or somewhat
widened upwards, very obtuse, aristate from the midrib and often from several
of the
upper veins, cordate or almost auricled at base, entire or undulate, somewhat
crisped
and minutely cartilaginousrevolute, moderate (3.5-5.5 x 6.5-10 cm.), slightly
glossy,
glabrate or somewhat stellate-fleecy in sheltered places, especially beneath;
veins about
8 pairs, often with fainter intermediates, usually branched and looped; petiole
hairy,
2 x 5-10 mm. Catkins: female 30 mm. long, glabrescent, interruptedly several-flowered.
Fruit biennial ?, the young cup with thin appressed blunt glabrescent brown
scales;
acorn (normal?) very slender, 7 x 16 mm., evidently long-exserted.
Western Sierra Madre region of Mexico.