| Hemibaccharis salmeoides S.F. Blake, 1926 |
| Hemibaccharis sescenticeps S.F. Blake, 1924 |
| Hemibaccharis simplex S.F. Blake, 1924 |
| Hemibaccharis torquis S.F. Blake, 1924 |
| Hemixanthidium Delpino, 1871 |
| Hemizonia DC., 1836 |
| Hemizonia australis (D.D. Keck) D.D. Keck, 1958 |
| Hemizonia conjugens D.D. Keck, 1958 |
| Hemizonia fasciculata (DC.) Torr. & A. Gray, 1843 |
| Hemizonia floribunda A. Gray, 1876 |
| Hemizonia frutescens A. Gray, 1876 |
| Hemizonia greeneana Rose, 1890 |
| Hemizonia greeneana var. greeneana Rose, 1890 |
| Hemizonia greeneana var. peninsularis (Moran) B.L. Turner, 1990 |
| Hemizonia kelloggii Greene, 1883 |
| Hemizonia laevis (D.D. Keck) D.D. Keck, 1958 |
| Hemizonia martirensis D.D. Keck, 1935 |
| Hemizonia palmeri Rose, 1890 |
| Hemizonia paniculata A. Gray, 1883 |
| Hemizonia parryi Greene, 1882 |