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Urban Tree Key / Leaves simple / Leaves alternate / Margin wavy / Palmately veined / No sap / Lobed / >3.5″ wide

Is the base of the leaf stalk swollen or not?

Base of leaf stalk swollen, covering axillary bud

Stipules encircling the stem and leaving a ring scar after falling
Plane Trees & Sycamores (Platanus spp.)

Base of leaf stalk not swollen

Stipule free, no ring scar around node

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

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