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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon barbatus (Cav.) Roth
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Penstemon barbatus (Cav.) Roth | Penstemon barbatus (Cav.) Roth | 16 | Fedorov, 1974 | Sugiura 1931, 1936b | ||
| ! | Penstemon barbatus (Cav.) Roth | Penstemon barbatus (Cav.) Roth | 16 | Fedorov, 1974 | Nisbet, Jackson 1960 | ||
| ! | Penstemon barbatus (Cav.) Roth | Penstemon barbatus (Cav.) Roth | 16 | Fedorov, 1974 | Beaman et al. 1962 | ||
| ! | Penstemon barbatus (Cav.) Roth | Penstemon barbatus (Cav.) Roth | 16 | Darlington, 1955 | Sugiura "1936b | ||
| ! | Penstemon barbatus (Cav.) Roth | Penstemon barbatus (Cav.) Roth | 16 | Cave1962 | Beaman et al. 1962 |