landscaping

back hillside: clay, south face, drought tolerant, erosion control, california natives
Buckwheats: great for hillside erosion and butterflies . 10 ft trees on hillside: Louis Edmunds Manzanita
mountain lilacs for hill groundcover: Ceanothus Joyce Coulter

Common name: Creeping Mountain Lilac.

http://www.laspilitas.com/nature-of-california/plants/arctostaphylos-stanfordiana-bakeri-louis-edmunds-manzanita

look at desert willow for flowering tree for birds -likes some water