Taxa: Physostegia virginiana ssp. virginiana (Dracocephalum denticulatum, Dracocephalum formosius, Dracocephalum virginianum, Physostegia formosior, Physostegia speciosa, Physostegia virginiana var. elongata, Physostegia virginiana var. formosior, Physostegia virginiana var. granulosa, Physostegia virgini
... (show all)ana var. speciosa)