Fraxinus latifolia Oregon ash

Oregon ash is native to western North America, including the neighborhood of Palo Alto. The leaves, up to 12 inches long, may have five to seven leaflets of which the terminal leaflet is longest and may be 6 inches long. The margins are wavy, but practically without teeth, and the side leaflets may be stalkless. Samaras are borne on female trees and are about 1½ inches long. Several large rough-barked trees at the corner of Roth Way and Lasuen Street may be Oregon ash.

Name derivation: Fraxinus – classical Latin name for ash; latifolia – broad-leaved.