Quercus gravesii Sudw.

West Texas, N.E. Mexico (Coahuila, Nuevo Leon, Tamulipas); 1200-2300 m; restricted area, but common in its range;

reaches 15 m tall;

10-18 x 5-9 cm; deciduous; thin, leathery; ovate, oblong, lanceolate or elliptical; base rounded or cuneate; apex acute aristate; margin not revolute, apically with 2-3 pairs of bristle-tipped lobes, with deep rounded sinuses, the terminal lobe elongated; hairless, lustrous light green adaxially; pale and reddish brown beneath, with axil tufts of fasciate hairs; red when unfolding and at fall; 4-6 pairs of secondary veins prominent both sides but slightly adaxialy; epidermis smooth ; petiole hairless or glabrescent, 1-3 cm long;

in spring; male inflorescences 6-7 cm long, sparcely hairy; female inflorescences to 1.5 cm long, bearing 1-3 flowers on pinkish brown, glabrescent stalks;

acorn 1.2-1.5 cm, ovoid to globose; pubescent; singly on a short peduncle 0.7-3 cm long; enclosed 1/3 to 1/4 by deep, halfround, hairy, 1.5 cm wide cup, with flat scales; maturing in 2 years in October-November;

– A. Camus : n° 429; – Sub-genus Quercus, section Lobatae, Series Coccineae; – Close to Q.shumardii and Q.buckleyi . – Different from Q. canbyi in having broad aristate teeth from the apex to the base, the terminal lobe elongate and having short aristate teeth or simple bristle tips. – Henry S. Graves (1871-1950) was at the head of US Forests Department.