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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon laetus var. laetus
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Penstemon laetus var. laetus | Penstemon laetus A. Gray | 8II | 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. |