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CCDB → Angiosperms → Orchidaceae → Grandiphyllum
| Taxon name | Status | Median (n) |
| Oncidium harrisonianum Lindl. | Synonym of Grandiphyllum auricula (Vell.) D. Neto | 21 |
| Oncidium pulvinatum Lindl. | Synonym of Grandiphyllum divaricatum (Lindl.) D. Neto | 22 |
| Oncidium robustissimum Rchb. | Synonym of Grandiphyllum divaricatum (Lindl.) D. Neto | 22 |