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CCDB → Angiosperms → Casuarinaceae → Gymnostoma
| Taxon name | Status | Median (n) |
| Gymnostoma deplancheanum None | Synonym of Gymnostoma deplancheanum (Miq.) L. A. S. Johnson | 8 |
| Casuarina papuana S. Moore | Synonym of Gymnostoma papuanum (S. Moore) L. A. S. Johnson | 8 |