| Gundlachia diffusa (Benth.) Urbatsch & R.P. Roberts, 2004 |
| Gundlachia riskindii (B.L. Turner & G. Langford) Urbatsch & R.P. Roberts, 2004 |
| Gundlachia triantha (S.F. Blake) Urbatsch & R.P. Roberts, 2004 |
| Gundlachia truncata (G.L. Nesom) Urbatsch & R.P. Roberts, 2004 |
| Gutierrezia Lag., 1816 |
| Gutierrezia alamanii A. Gray, 1852 |
| Gutierrezia alamanii var. alamanii A. Gray, 1852 |
| Gutierrezia alamanii var. megacephala (Fernald) M.A. Lane, 1980 |
| Gutierrezia argyrocarpa Greenm., 1904 |
| Gutierrezia arizonica (A. Gray) M.A. Lane, 1980 |
| Gutierrezia bracteata Abrams, 1907 |
| Gutierrezia californica (DC.) Torr. & A. Gray, 1842 |
| Gutierrezia conoidea (Hemsl.) M.A. Lane, 1980 |
| Gutierrezia dracunculoides (DC.) S.F. Blake, 1924 |
| Gutierrezia dunalii (Spreng.) G.L. Nesom, 2000 |
| Gutierrezia glutinosa Sch. Bip., 1855 |
| Gutierrezia grandis S.F. Blake, 1924 |
| Gutierrezia gymnospermoides A. Gray, 1853 |
| Gutierrezia lindheimeriana Scheele, 1849 |
| Gutierrezia megalocephala (Fernald) G.L. Nesom, 2000 |