Chaetadelpha is a monotypic genus in the sunflower family containing the single species Chaetadelpha wheeleri, or Wheeler's skeletonweed. This brushy perennial plant is native to the western United States. It forms a low bush with plentiful erect stems covered in very narrow, long and pointed leaves. Branchlets emerge from the stems and each bears a cylindrical flower which opens at the end into a star-shaped white or pale purple flower with five ray florets. The center...