| Wamalchitamia Strother, 1991 |
| Wamalchitamia appressipila (S.F. Blake) Strother, 1991 |
| Wamalchitamia aurantiaca (Klatt) Strother, 1991 |
| Wamalchitamia dionysi Strother, 1991 |
| Wamalchitamia serboana B.L. Turner, 2013 |
| Wamalchitamia strigosa (DC.) Strother, 1991 |
| Wamalchitamia yautepecana B.L. Turner, 2013 |
| Wedelia Jacq., 1760 |
| Wedelia acapulcensis Kunth, 1818 |
| Wedelia acapulcensis var. acapulcensis Kunth, 1818 |
| Wedelia acapulcensis var. ayerscottiana (B.L. Turner) Strother, 1991 |
| Wedelia acapulcensis var. cintalapana Strother, 1991 |
| Wedelia acapulcensis var. hispida (Kunth) Strother, 1991 |
| Wedelia acapulcensis var. parviceps (S.F. Blake) Strother, 1991 |
| Wedelia acapulcensis var. ramosissima (Greenm.) Strother, 1991 |
| Wedelia acapulcensis var. tehuantepecana (B.L. Turner) Strother, 1991 |
| Wedelia adhaerens S.F. Blake, 1932 |
| Wedelia aggregata (Greenm.) B.L. Turner, 1988 |
| Wedelia aurea D. Don, 1835 |
| Wedelia ayerscottiana B.L. Turner, 1986 |