When plants emerge gardeners want to know what they are in order to decide to eradicate/remove or leave to grow, mature, flower and spread more.
Here are a few more helpful websites -
Wildflowers of the US
for all those milkweeds that are emerging right now - feed the Monarchs!
Cleverly, this wildflower identification website is organized by flower color
Oklahoma wildflowers blog hasn't been updated in years but the existing information works
Kansas wildflowers listed by color
If you know of more, let us all in on your tips and favorite identification sites!