Like many in the pea family they have a swollen petiole base called a pulvinus.
Fruit is a large pod, green turning dark brown. Very twisted and very hard. We don't seem the very often as all the cultivars planted and grown are males. 'Sunburst' is a popular cultivar with golden foliage, I can't identify any of the others by sight.
With so many trees with pinnately compound leaves they all look alike to my students. Several keys, small crenate margins on the leaflets, the stems are zig zag and quite often you will find both pinnnate and bipinnate leaves on the same tree, often the same branch.
Soquel Dr across from Twins Palms Dr
River St. In the parking lot at the Patagonia Outlet Store
Front St. across from Trader Joes is a long line of them.
Shopping center at corner of Mt Hermon Dr and Graham Hill.