Trees, insects, mites, and diseases of Canada's forests
Group 10
Oaks
Leaves alternate, simple; edges lobed
The only oak native to British Columbia
Trees occurring in a few locations in southern Ontario, north of Lake Erie, on lowlands and along streams, on poorly drained, heavy soils; leaves with 7-11 lobes, slender tip and rounded base; cup slightly hairy
Leaves lobed, tip slender, notches U-shaped; buds completely covered with dense, grayish-white hairs
Leaves lobed, lower surface hairy; acorn covered with a fringed cup
Leaves coarsely toothed ending in a large tooth, 10-18 cm long, 10-15 principal veins per side
Leaves coarsely toothed, 5-15 cm long, 4-9 principal veins per side
Tree uncommon in Canada, occurring in Ontario, east of Lake Superior and north of Lake Erie, in open, disturbed habitats; leaves lobed with slender tips, constricted toward the base; twigs reddish-brown
Leaves with 5-7 lobes, tip slender, notches U-shaped; cup shallow
Leaves with 7-9 lobes, tip slender, notches V-shaped; cup hairless
Leaves lobed, lower surface hairy; acorns on long stalks
Leaves lobed, lower surface hairless; fringeless cup enclosing one-quarter of the nut