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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon arkansanus Pennell
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Penstemon arkansanus Pennell | Penstemon arkansanus Pennell | 16 | IPCN65 | Crosswhite & K. 1965 | |||
| ! | Penstemon arkansanus Pennell | Penstemon arkansanus Pennell | 16 | Fedorov, 1974 | Crosswhite, Kawano 1965 |