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Urban Tree Key / Leaves simple / Opposite or Whorled / Opposite / <6″ wide / Leaves green / Leaves stalked

Leaves <¼” or ≥½” wide?

Leaves less than ¼" wide

Desert Willow (Chilopsis linearis)

Leaves ≥½" wide

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

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