United States Department of Agriculture
The history of California's vegetation, from origins in the Mesozoic through Quaternary is outlined. Climatic and geologic history and the processes driving changes in vegetation over time are also described.
Vegetation of the California Great Basin is summarized.
The 1351?ha Walker Fire burned in late August 2015 on the eastern Sierra Nevada, California escarpment from sagebrush steppe and pinyon pine woodlands (2150?m) through mid-elevation forests into subalpine whitebark pine (WBP; 3310?m). Fuels were particularly dry due not only to the season but as a result of a record multi-year drought (2012?2015). The fire...