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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon gairdneri Hook.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Penstemon gairdneri Hook. | Penstemon gairdneri Hook. | 8 | IPCN67-71 | SPELLENBERG, R. 1967. In Documented chromosome numbers of plants. Madrono 19: 134="136. |