| Cycadaceae | |
Cycas rumphii var. bifida
| Dyer | J. Linn. Soc., Bot. 26(179–180): 560 | 1902 |
| Cycadaceae | |
Cycas rumphii subsp. normanbyana
| Schuster | | |
| Cycadaceae | |
Cycas rumphii subsp. normanbyana
| (F. Muell.) J. Schust. | Pflanzenr. IV, 1: 75 | 1932 |
| Cycadaceae | |
Cycas rumphii fo. palauica
| Kaneh. | | |
| Cycadaceae | |
Cycas rumphii fo. papauna
| (F. Muell.) Kaneh. | Bot. Mag. (Tokyo) 52: 350 | 1938 |
| Cycadaceae | |
Cycas rumphii fo. rumphii
| | | |
| Cycadaceae | |
Cycas rumphii subsp. rumphii
| | | |
| Cycadaceae | |
Cycas rumphii var. rumphii
| | | |
| Cycadaceae | |
Cycas rumphii fo. seemannii
| (A. Braun) Kaneh. | J. Jap. Bot. 14: 587 | 1938 |
| Cycadaceae | |
Cycas rumphii var. seemannii
| (A. Braun) Parham | Agric. J. (Suva) 19: 94 | 1948 |
| Cycadaceae | |
Cycas rumphii fo. subinclusa
| | | |
| Cycadaceae | |
Cycas rumphii var. subinclusa
| Schuster | | |
| Cycadaceae | |
Cycas rumphii var. subinclusa
| J. Schust. | Pflanzenr. IV, 1: 75 | 1932 |
| Cycadaceae | |
Cycas rumphii var. timorensis
| Miq. | Comm. Phytogr. 125 | 1840 |
| Cycadaceae | |
Cycas rumphii fo. undulata
| (Desf. ex Gaudich.) Kaneh. | J. Jap. Bot. 14: 587 | 1938 |
| Cycadaceae | |
Cycas rumphii subsp. zeylanica
| J. Schust. | Pflanzenr. 99: 75, pl. 10C–D, llK–M | 1932 |