The Collaborative International Dictionary
Adenostoma fasciculatum
Chamisal \Cha`mi*sal"\, n. [Amer. Sp., fr. Sp. chamiza a kind of wild cane.]
(Bot.) A California rosaceous shrub ( Adenostoma fasciculatum) which often forms an impenetrable chaparral.
A chaparral formed by dense growths of this shrub.
Wikipedia
Adenostoma fasciculatum
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.