Japanese Blue Oak
Native to (or naturalized in) Oregon:
Broadleaf, evergreen, live-oak, tree to 20-30 ft (3-10 m) tall, it may reach over 50 ft (13 m) in its native habitat, upright-oval to rounded form. Leaves simple, alternate, elliptic-lanceolate, 7-15 cm long and 3-6 cm wide, dull green and hairless above, whitish pubescent below, margin entire or serrate on the upper half; new leaves have a silky-pubescence and are bronzy or purplish-green. Yellowish-green flowers are in separate male and female catkins which appear in spring, inconspicuous. Acorns are 1–1.5 cm long, brown, with a series of concentric rings on the outside of the acorn cup (called a "ring-cupped oak").
- Sun to partial shade, best in rich, humusy, medium moisture, well-drained soils
- Hardy to USDA Zone 7 Its native range extends from the Himalayas eastward to China, Japan and Korea.
- glauca: having a bloom, a whitish coating, (possibly a reference to the pubescent on new leaves)