Urban Tree Key
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Urban Tree Key / Leaves simple / Leaves alternate / Margin wavy / Pinnately veined / Not acorn / Deciduous / Symmetrical / Erect / Dry / Margin Flat / Not rough / Bark rough / Fruits cone-like

Alnus spp.

Alders

Betula spp.

Birches

Cones on branched stems, persistent, woody……….Alnus spp.

Cones solitary, breaking apart at maturity……….Betula spp.

Urban Forest Ecosystems Institute
NRES Department
California Polytechnic State University
San Luis Obispo, CA 93407

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