Lamiaceae | |
Dracocephalum virginianum var. album
| Nutt. | Trans. Amer. Philos. Soc. n.s., 5: 187 | 1835 |
Lamiaceae | |
Dracocephalum virginianum var. granulosum
| (Fassett) Core | Castanea 37: 301 | 1973 |
Lamiaceae | |
Dracocephalum virginianum var. speciosum
| Farw. | Pap. Michigan Acad. Sci. 1: 97 | 1923 |