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CCDB → Angiosperms → Araceae → Wolffia
| Taxon name | Status | Median (n) |
| Wolffia angusta Landolt | Accepted | 20 |
| Wolffia arrhiza (L.) Horkel ex Wimm. | Accepted | 25 |
| Wolffia australiana (Benth.) Hartog & Plas | Accepted | 10 |
| Wolffia borealis (Engelm.) Landolt | Accepted | 15 |
| Wolffia brasiliensis Wedd. | Accepted | 21 |
| Wolffia columbiana H. Karst. | Accepted | 20 |
| Wolffia globosa (Roxb.) Hartog & Plas | Accepted | 20 |
| Wolffia microscopica (Griff.) Kurz | Accepted | 35 |
| Wolffia punctata Griseb. | Synonym of Wolffia brasiliensis Wedd. | 21 |