| Acacia unijuga Rose, 1903 |
| Acacia usumacintensis Lundell, 1940 |
| Acacia velvae L. Rico, 1983 |
| Acacia vernicosa Standl., 1919 |
| Acacia villaregalis McVaugh, 1987 |
| Acacia villosa (Sw.) Willd., 1806 |
| Acacia viridiflora Kunth, 1821 |
| Acacia willardiana Rose, 1890 |
| Acacia wrightii Benth., 1852 |
| Acacieae Dumort., 1829 |
| Acaciella Britton & Rose, 1928 |
| Acaciella angulosa (Bertol.) Britton & Rose, 1928 |
| Acaciella angustissima (Mill.) Britton & Rose, 1928 |
| Acaciella angustissima var. angustissima (Mill.) Britton & Rose, 1928 |
| Acaciella angustissima var. filicioides (Cav.) L. Rico, 2004 |
| Acaciella angustissima var. texensis (Torr. & A. Gray) L. Rico, 2005 |
| Acaciella barrancana (Gentry) L. Rico, 2006 |
| Acaciella bicolor Britton & Rose, 1928 |
| Acaciella breviracemosa Britton & Rose, 1928 |
| Acaciella calderonii (Standl.) Britton & Rose, 1928 |