Trees, insects and diseases of Canada's forests

Pacific Coast tree; leaves with 5 large lobes; wings of paired keys nearly parallel

Leaves usually with 3 lobes, with dense hairs; keys on hairy stalks, about same the length as the wings; twigs dull; mature bark dark gray, deeply furrowed, often scaly

Western Canada shrubby tree; leaves coarsely double-toothed

Only maple with compound leaves

Leaves longer than wide, margin single-toothed with coarse teeth; twigs hairy; flowers erect

Leaves double-toothed with numerous teeth and shallow notches; flowers red; keys with wings forming an angle of about 60 degrees

Leaves double-toothed, with numerous teeth and deep, narrow notches; flowers greenish-yellow; keys very large, forming an angle of about 90 degrees

Leaves as wide as long, double-toothed; bark green with vertical white strips; twigs hairless; flowers drooping

Leaves usually with 5 lobes, lower surface hairless; paired keys with stalks longer than the wings; twigs shiny; mature bark with long vertical ridges curled outward along one side

Shrubby tree of southern British Columbia; leaves with 7-9 lobes; wings spreading widely