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CCDB → Angiosperms → Menyanthaceae → Ornduffia
| Taxon name | Status | Median (n) |
| Villarsia albiflora F. Muell. | Synonym of Ornduffia albiflora (F. Muell.) Tippery & Les | 9 |
| Villarsia calthifolia F. Muell. | Synonym of Ornduffia calthifolia (F. Muell.) Tippery & Les | 9 |
| Villarsia reniformis R. Br. | Synonym of Ornduffia reniformis (R. Br.) Tippery & Les | 27 |
| Villarsia umbricola var. beaugleholei Aston | Synonym of Ornduffia umbricola var. beaugleholei (Aston) Tippery & Les | 27 |