Japanese Emperor Oak
Other names
Daimio Oak, Kashiwa
Growth habit
Tree
Perennation
Long-lived polycarpic perennial
Native distribution
Japan, Korea, and China
Location
Source of plant
Windrose Nursery, Fairweather Gardens
Description
Deciduous tree, fast growing to 20-25m. Trunk to 1m diameter. Crown large, rounded. Bark brown, fissured and split into large subrectangular plates, grey-scaly. Branches spreading to ascending. Branchlets grey-tomentose, lenticellate. Leaves 15-30(-50)x8-14(-30)cm, orbicular-obovate to oblong-obovate, base attenuate and rounded to cordate, apex attenuate or rounded, margin sinuately lobed, lobes large, rounded, apex often mucronulate, pale yellow tomentose at first, becoming dark green and glabrous except on nerves above, paler and densly tomentose beneath, nerves 8-12 pairs; petiole 3-6(-12)mm, or almost absent. Acorns ripe in first year, 1.2-2.4x1.2-1.7cm, ovoid to subglobose, ochre yellow, glabrous, apex rounded, mucronate; cupule hemispherical, scales adpressed, upper scales erect to recurved, enclosing more than half of acorn.
USDA Hardiness Zone
5