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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon laevigatus Soland.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Penstemon laevigatus Soland. | Penstemon laevigatus Soland. | 96 | Darlington, 1955 | La Cour 1931 |