Urban Tree Key
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Urban Tree Key / Leaves simple / Opposite or Whorled / Opposite / <6″ wide / Leaves green / Leaves stalked / >1/2″ wide / Undersides green

Secondary leaf veins curving upward or parallel?

Secondary veins curving upward

When leaves torn in half, vein strings visible between pieces

Secondary veins parallel

No vein strings visible when leaves torn

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

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