Description
Ecoregions are broad ecological zones defined by consistent patterns of climate, geology, soils,
and biological communities that distinguish them from neighboring areas. Ecoregions do not follow
state lines – not even close – so a state as large as California has many different distinct ecoregions,
many of which it shares with bordering states.
The picture on the previous page outlines the Level 3 Ecoregions that are within the bounds
of California, but those Level 3 ecoregions can be broken down into Level 4 ecoregions, or
consolidated into Level 2 or Level 1 ecoregions. The three Environmental Protection Agency (EPA)
Level 1 ecoregions that cover California are Ecoregion 6.0 (Northwestern Forested Mountains),
Ecoregion 10.0 (North American Deserts) and Ecoregion 11.0 (Mediterranean California).
In this book you will see 35 examples of the 1,300ish native plants that call California home.









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