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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon calycosus Small
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Penstemon calycosus Small | Penstemon calycosus Small | 96 | IPCN65 | Crosswhite & K. 1965 | ||
| Penstemon calycosus Small | Penstemon calycosus Small | 96 | Fedorov, 1974 | Crosswhite, Kawano 1965 |