Trees, insects and diseases of Canada's forests
Look at the figures and select the one that seems to match your tree.
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Group 11
Leaves alternate, simple; edges toothed
Twigs smooth; leaves toothed, oval, lower surface glandulous; fruits borne in persistent catkins
Twigs with rough thorns; many-seeded apple-like fruits
Twigs smooth; leaves heart-shaped, single-toothed, base asymmetrical; flowers and fruits borne on long joined stalks, with a long and distinctive membraneous bract
Twigs smooth; leaves single-toothed, base symmetrical; bark smooth, light bluish-gray
Twigs smooth; leaves double-toothed; leaves and twigs often glandulous
Twigs with or without rough thorns; flowers showy, with 5 petals; fruits containing a single flattened stone
Twigs smooth; leaves double-toothed, base broadly asymmetrical
Twigs with smooth thorns
Twigs smooth; leaves double-toothed, base symmetrical, oval to almost round, irregular in shape
Twigs smooth; leaves oval, single-toothed, with lateral veins that do not reach each tooth, twice as wide as long
Twigs smooth; leaves oval, single-toothed, with lateral veins that do not reach every tooth; bark smooth and gray; fruits berry-like
Twigs smooth; leaves narrow, single-toothed, with lateral veins that do not reach each tooth; buds covered by a single scale
