All yellow

Normally the flower heads of Gaillardia pulchella, known as firewheel and Indian blanket, have red rays with yellow tips. Every once in a while you get a flower head whose rays are completely yellow. In the full-size version of the first picture I counted four of them (and could distinguish them from the yellow greenthread flower heads mixed in). The second photograph gives you a much closer look at an all-yellow firewheel. Both views are from a “vacant” lot in northwest Austin on May 19.