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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon cardinalis
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Penstemon cardinalis | Penstemon cardinalis Wooton & Standl. | 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. | ||
| Penstemon cardinalis Wooton & Standl. | Penstemon cardinalis Wooton & Standl. | 8 | IPCN online | Spellenberg, R. 1986. Chromosome Number Reports 90. Taxon 35: 197. | |||
| ! | Penstemon cardinalis Wooton & Standl. | Penstemon cardinalis Wooton & Standl. | 16 | Fedorov, 1974 | Nisbet, Jackson 1960 |