Adenostoma fasciculatum (chamise or greasewood) is a flowering plant native to Oregon, Nevada, California, and northern Baja California.This shrub is one of the most widespread plants of the chaparral biome. The leaves are shiny with flammable oils, especially in warmer weather. The branches terminate in bunches of white tubular flowers five mm diameter, with five petals and long stamens. The fruit is a dry achene.

Source: Wikipedia