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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon clutei A. Nelson
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Penstemon clutei A. Nelson | Penstemon pseudospectabilis subsp. clutei (A. Nelson) D. D. Keck | 8 | IPCN online | Schaack, C. G. 1982. In IOPB chromosome number reports LXXV. Taxon 31: 366–367. | |||
| ! | Penstemon clutei A. Nelson | Penstemon pseudospectabilis subsp. clutei (A. Nelson) D. D. Keck | 16 | Fedorov, 1974 | Jackson R. C. | ||
| ! | Penstemon clutei A. Nelson | Penstemon pseudospectabilis subsp. clutei (A. Nelson) D. D. Keck | 16 | Fedorov, 1974 | D. n. 1960) |