Max, I saw that last year along the freeway just north of New Braunfels. I gathered some seeds, then didn't get them planted. It is a beautiful flower, very much like a thistle but without the stickers. Geyata Ajilvsgi used it on the cover of her book "Wildflowers of Texas".
Oh, please do and let me know! Geyata says in her book that they are easily cultivated, and are sold in seed catalogs as powderpuff or sweet sultan. I am tempted to try to germinate a few of the ones I gathered in pots, as they might become too old before next year. If you get an opportunity, would you gather some for me? I will owe you my entire garden, anyway, since you are so generous.