fast growing shade tree for california zone 9b

to the forum!

Chinese Flame Tree— Koelreuteria paniculata
Tipu— Tipuana tipu
Purple Robe Black Locust— Robinia pseudoacacia 'Purple Robe'
Eastern Redbud— Cercis canadensis ~ many cultivars in many colors
Chinese Elm— Ulmus parvifolia
Silk Oak—Grevillea robusta
Many kinds of Eucalyptus

All depends on how big you want it to get

Silk Tree - Albizia julibrissin
Mulberry Tree
Corkscrew Willow

Pistache trees and liquid ambers are both common street trees, I always liked their fall colors.

Pistache trees are the big ones lining parts of old town in Modesto.

And Modesto Ash Trees.