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CCDB → Angiosperms → Proteaceae → Protea → Protea grandiceps Tratt.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Protea grandiceps Tratt. | Protea grandiceps Tratt. | 24 | IPCN online | Ikuma, M. 1986. Study on chromosome number of Protea species in South Africa. Sci. Rep. Res. Inst. Evol. Biol. 3: 229–232. | |||
| Protea grandiceps Tratt. | Protea grandiceps Tratt. | 24 | Fedorov, 1974 | de Vos 1943 | |||
| ! | Protea grandiceps Tratt. | Protea grandiceps Tratt. | 24 | Oberlander, 2016 | Ikuma, M. 1986 |