TREE CATALOG
NATIVE & NON-NATIVE
In the context of this tree catalog, “native” refers to tree species that either naturally occur in Oregon today, or originate from nearby regions with similar conditions and are expected to thrive in Oregon as the climate continues to change. This definition embraces not only species traditionally considered native to the area but also those that are regionally native, meaning they naturally occur nearby and can thrive under similar environmental conditions. We use “native” in this way to acknowledge that tree species have migrated across the continent over millions of years, with their ranges shifting significantly in response to climate changes such as ice ages and periods of warming. Our approach recognizes the adaptability and diversity of plants in this unique region and incorporates both native species and species whose introduction could create more resilient urban forests, improving climate resilience in our cities.
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