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CCDB → Pteridophytes → Marsileaceae → Pilularia
| Taxon name | Status | Median (n) |
| Pilularia americana A. Braun | Accepted | 10 |
| Pilularia minuta Durieu | Unresolved | 13 |
| Pilularia novae-zelandiae Kirk | Unresolved | 10 |
| Pilularia globulifera L. | Synonym of Calamistrum globuliferum (L.) Kuntze | 13 |