Malvaceae Fremontodendron californicum Flannel Bush Flannel Bush Southwestern United States shrub Yellow Leathery and fuzzy texture Hairs and young shoots can cause skin irritation Yes References Loasaceae Mentzelia lindleyi Blazing Star Blazing Star Coast Ranges of California and Arizona Annual wild flower Yellow Spikey Commonly called blazing stars or stickleafs; other names include "evening stars" and "moonflowers" Somewhat References Iridaceae Iris douglasiana Douglas Iris Douglas Iris coastal regions of Northern and Central California and southern Oregon shrub Pale Purple about 2 centimetres (1 in) wide Noxious weed in pastures, because it forms clumps that inhibit other vegetation, and its leaves are bitter and unpalatable to cattle Somewhat References Papaveraceae Eschscholzia californica California Poppy California Poppy grassy and open areas from sea level to 2,000m (6,500 feet) altitude in the western United States throughout California, extending to Oregon, southern Washington, Nevada, Arizona, New Mexico, and in Mexico in Sonora and northwest Baja California. shrub Orange alternately branching glaucous blue-green foliage, leaves are ternately divided into round, lobed segments April 6 is designated California Poppy Day Yes References