Xanthocephalum microcephalum (DC.) Shinners | Gutierrezia microcephala (DC.) A. Gray | | | Xanthocephalum microcephalum(DC.) Shinners | Gutierrezia microcephala(DC.) A. Gray |
Xanthocephalum sarothrae (Pursh) Shinners | Gutierrezia sarothrae (Pursh) Britton & Rusby | | | Xanthocephalum sarothrae(Pursh) Shinners | Gutierrezia sarothrae(Pursh) Britton & Rusby |
Xanthocephalum gymnospermoides (A. Gray) Benth. & Hook. f. | | a | | Xanthocephalum gymnospermoides(A. Gray) Benth. & Hook. f. | |