Michigan Wildflowers
Very cool site, a must see if only to view the gorgeous pics of Calypso bulbosa!

Wildflowers

Another good identification site by color. I finally found what I was looking for here after putting 2 hours of research into it. Obviously, this plant grew from a dropped seed (from a bird) and we knew it was something we hadn't seen in our garden before, turned out to be a Yellow Goat's Beard, I kind of like it so I'm going to save seed from it, : )

Missouri Wildflowers
This is a terrific site for wildflower identification, by color or genus and species.