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Urban Tree Key / Pinnately compound / Leaves opposite / Leaves pinnate/ Leaflets ≥ 7

Are the leaflet stalks > or < ¼” long?

Leaflet stalks greater than ¼"

Ashes
Fraxinus spp.

Leaflet stalks less than ¼" or sessile

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

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