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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon cristatus Nutt.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Penstemon cristatus Nutt. | Penstemon cristatus Nutt. | 16 | Fedorov, 1974 | La Cour (D. 1945) |