The bush poppy is an evergreen shrub with gray green leaves and yellow flowers. Dendromecon harfordii (Island Bush Poppy), is fast growing to 8-15 feet tall and 8-10 feet wide, with flowers in spring and early summer. Native to dry slopes on the Channel Islands in southern California. Best near the coast. Dendromecon rigida (Bush Poppy), grows 4-8 feet tall and 4-6 feet wide and flowers in spring. Native to dry slopes in the Coast Ranges and Sierra Nevada foothills from central California to northern Baja California. Both species thrive in sun to part shade with excellent drainage.