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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon grandiflorus Nutt.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Penstemon grandiflorus Nutt. | Penstemon grandiflorus Nutt. | 16 | IPCN65 | Crosswhite & K. 1965 | ||
| Penstemon grandiflorus Nutt. | Penstemon grandiflorus Nutt. | 8II | 16 | IPCN online | Freeman, C. C. 1983. Chromosome numbers in Great Plains species of Penstemon (Scrophulariaceae). Brittonia 35(3): 232–238. | ||
| ! | Penstemon grandiflorus Nutt. | Penstemon grandiflorus Nutt. | 16 | C-values database | Broderick SR, Stevens MR, Geary B, Love SL, Jellen EN, Dockter RB, Daley SL, Lindgren DT. 2011. A survey of Penstemon's genome size. Genome 54: 160-173. |