Ooh, this is fun. The USGS (U.S. Geological Survey) has a Science In Your State feature (which, by the way, doesn't confine itself to science links).
Here are the links to Oregon, California, Hawaii, Ohio, Indiana, Washington, Massachusetts, Georgia, and Texas to get you started.
Learn how: Easily Identify Common Plant Families - Learn how: Easily Identify Common Plant Families: The plant kingdom is composed of a wide variety of plant species. It can be subdivided into vascular and ...
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