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CCDB → Angiosperms → Piperaceae → Piper → Piper postelsianum Maxim.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Piper postelsianum Maxim. | Piper umbellatum L. | 26 | IPCN online | Okada, H. 1986. Karyomorphology and relationships in some genera of Saururaceae and Piperaceae. Bot. Mag. (Tokyo) 99: 289–299. | |||
| Piper postelsianum Maxim. | Piper umbellatum L. | 26 | IPCN75-78 | Ono 1975 | |||
| Piper postelsianum Maxim. | Piper umbellatum L. | 26 | IPCN75-78 | Ono 1977a |