The whole Texas/Lindheimer thing of yesterday was prompted when Steve Schwartzman posted a terrific back lit shot of Lindheimer's senna. Here's another wild senna, Senna hebecarpa from the same site as sourwood. This senna sometimes has smooth sepals and styles, and sometimes they're very white fuzzy. In this image the plant's attempt at fuzzy is assisted by an even fuzzier caterpillar. Is the senna imitating the noxious caterpillar to help keep pests away? Or is the caterpillar hanging around fuzzy senna to farther confuse predators?