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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon secundiflorus Benth.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Penstemon secundiflorus Benth. | Penstemon secundiflorus Benth. | 8 | IPCN online | Freeman, C. C. & R. E. Brooks. 1988. Documented plant chromosome numbers 1988: 1. Chromosome counts for North American plants -- I. Sida 13: 241–250. | |||
| ! | Penstemon secundiflorus Benth. | Penstemon secundiflorus Benth. | 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. |