a butterfly-attracting purple flower, and Engelmann daisy, which thrives in rocky limestone soil. Willow City Loop (Fredericksburg): This scenic 13-mile drive is a wildflower lover’s dream ...

Plains wild indigo: flowers are cream colored and pea-like with green leaves that turn gray towards the end of summer. Engelmann daisy: Long-stalked, yellow, eight-petaled flowers that fold up ...