Northern Prairie Wildlife Research Center
Reference:
Epling, C. 1934. Preliminary revision of American Stachys. Feddes
Repert. Spec. Nov. Regni Veg. Bxeich. 80:1-75.
| Lead | Characteristic | Go To |
| 1 | Stems pubescent on the sides as well as on the angles. | S. palustris |
| 1 | Stems glabrous or pubescent with retrorse bristles only on the angles. | S. tenuifolia |