Texas Wildflower Identification
A couple of sites that will aid in identifying Texas wild flowers:
broken down by color of flower.
http://aggie-horticulture.tamu.edu/wildseed/index.html - a bit more
difficult to use because you need to know what you are looking for.
But, they have pictures, growing information and resources for seeds.
links curtosy of Nate on the mailing list