Camellia
Cornus
Endymion
Erysimum
Hyacinthus
Magnolia
Myosotis
Muscari
Narcissus
Osmanthus
Prunus
Rhododendron
Spiraea
Trillium
Tulipa
Viburnum

Plant selection guide portion near front of Sunset WESTERN GARDEN BOOK would be good place to look.

Thanks so much! You have been great help. I'll use that list and also look in my Western Garden Book. Cheers,Joe

My favorites-
Helleborus orientalis in pink and purple, part shade, does need some water in summer
Pulmonarias- cobalt blue, purple, pink, red, white, tough as nails in semi-shade variegated foliage the rest of the year, some reseeding
Lunaria biennial- heart-shaped leaves, purple or white flowers in spring, silver dollar dried luminescent seedheads for decoration, grows in our wet spring, seeds, then comes up in fall to bloom again next spring. Very well adapted to our climate, doesn't need supplemental water
Irises- succession of bloom with dwarf, miniature, intermediate, border, tall bearded
Species Tulips- T. batalinii, Spring Beauty, praestans Unicum- large for a species, bright red, variegated foliage, and trying this year- wilsoniana, vvedenskyi Tangerine Beauty?,
Daphne odora, D. collina, D. caucasius "Summer Ice"
Symphytum grandiflorum- tough invasive groundcover comfrey for difficult areas like dry shade, banks, under orchard trees, flowers go from pink to blue to white in spring
Native flowering currant- pink flowers on a shrub, completely adapted so doesn't need watering
Columbines- can be grown from seed, nice foliage, flower in spring from dwarf to tall, reseed so can be a weed problem, don't seem to need supplemental water