Native to (or naturalized in) Oregon:
- Broadleaf evergreen shrub 3-10 ft (~1-3 m), forms a dense tangle of branches, rounded crown, twigs tomentose, sometimes becoming hairless (glabrous). Leaves alternate, simple, leathery, 1.5-3 cm long, oblong to elliptic, convex above, tip sharply pointed, margin entire, rolled under to spiny toothed, upper surface minutely pubescent, dull green, lower surface somewhat hairy, pale green; petiole several mm long. Fruit (acorn) matures in 1 year, cup about 15 mm wide and 6 mm deep, bowl-shaped, nut 15-25 mm, ovoid to cylindrical, tip blunt or rounded.
- Hardy to USDA Zone 8 Native to California, in chaparral, foothill woodlands; Coast Ranges, northern Sierra Nevada Foothills, San Francisco Bay Area, and San Gabriel Mountains. Separated into two varieties, Quercus durata var. durata [Leather Oak], limited to serpentine soils and Quercus durata var. gabrielensis [San Gabriel Mtns. Leather Oak], found on loose slopes in non-serpentine soils. Serpentine soils are low nutrient soils which contain high amounts of magnesium and low amounts of calcium.