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CCDB → Angiosperms → Xanthorrhoeaceae → Simethis
| Taxon name | Status | Median (n) |
| Simethis mattiazzii (V. ). S. s.) . | Synonym of Simethis mattiazzii (Vand.) Sacc. | 24 |
| Simethis mattiazzii (Vand.) S. S. l. | Synonym of Simethis mattiazzii (Vand.) Sacc. | 24 |
| Simethis planifolia (L.) Gren. & Godr. | Synonym of Simethis mattiazzii (Vand.) Sacc. | 24 |