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CCDB → Angiosperms → Lamiaceae → Stachys → Stachys rigida Nutt. ex Benth.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Stachys rigida Nutt. ex Benth. | Stachys rigida Nutt. ex Benth. | 33 | 66 | IPCN online | Mulligan, G. A. & D. B. Munro. 1989. Taxonomy of species of North American Stachys (Labiatae) found north of Mexico. Naturaliste Canad. 116: 35–51. | ||
| Stachys rigida Nutt. ex Benth. | Stachys rigida Nutt. ex Benth. | 32 | IPCN online | Chambers, K. L., D. Green, S. Potampa & L. McMahan. 1998. IOPB chromosome data 13. Newslett. Int. Organ. Pl. Biosyst. (Oslo) 29: 18–22. |