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CCDB → Angiosperms → Lythraceae → Trapa
| Taxon name | Status | Median (n) |
| Trapa incisa Siebold & Zucc. | Accepted | 44 |
| Trapa japonica Flerow | Accepted | 40 |
| Trapa natans L. | Accepted | 24 |
| Trapa muzzanensis Szaf. & Kulcz. & Pawl. | Unresolved | 24 |
| Trapa maximowiczii Korsh. | Synonym of Trapa incisa Siebold & Zucc. | 44 |
| Trapa natans var. japonica Nakai | Synonym of Trapa natans L. | 24 |
| Trapa pseudoincisa Nakai | Synonym of Trapa natans L. | 24 |
| Trapa sibirica Flerow | Synonym of Trapa natans L. | 24 |
| Trapa media V. N. Vassil. | Synonym of Trapa rossica V. N. Vassil. | 24 |