The below pictures will link you to  more pictures of wildflowers and grasses and information on their culture.  They are provided by Kansas State University.   Using the information at this site can help you determine what selections of wildflowers and grasses you might like to include in your own prairie.
When designing your prairie and selecting the numerous wildflowers and grasses, take into consideration soil type, moisture, and hardiness of the plants.  The following is a link for a  Wildflower Selection Guide .  I hope this will be useful for selecting proper types of wild flowers for your prairie.
Another useful web site is  where you can find 
Ten Tips on Designing Prairies

Minnesota  University Build Your Own Praire

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