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

  • Alders

Twigs with rough thorns; many-seeded apple-like fruits

  • Apples

Twigs smooth; leaves heart-shaped, single-toothed, base asymmetrical; flowers and fruits borne on long joined stalks, with a long and distinctive membraneous bract

  • Basswood

Twigs smooth; leaves single-toothed, base symmetrical; bark smooth, light bluish-gray

  • Beeches

Twigs smooth; leaves double-toothed; leaves and twigs often glandulous

  • Birch

Twigs with or without rough thorns; flowers showy, with 5 petals; fruits containing a single flattened stone

  • Cherries / plums

Twigs smooth; leaves double-toothed, base broadly asymmetrical

  • Elms

Twigs with smooth thorns

  • Hawthorns

Twigs smooth; leaves double-toothed, base symmetrical, oval to almost round, irregular in shape

  • Hazels

Twigs smooth; leaves oval, single-toothed, with lateral veins that do not reach each tooth, twice as wide as long

  • Poplars / aspens / cottonwoods

Twigs smooth; leaves oval, single-toothed, with lateral veins that do not reach every tooth; bark smooth and gray; fruits berry-like

  • Serviceberries

Twigs smooth; leaves narrow, single-toothed, with lateral veins that do not reach each tooth; buds covered by a single scale

  • Willow
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