Taxa: Physostegia virginiana, Physostegia virginiana ssp. praemorsa, Physostegia virginiana ssp. virginiana, Physostegia virginiana var. arenaria, Physostegia virginiana var. elongata, Physostegia virginiana var. formosior, Physostegia virginiana var. granulosa, Physostegia virginiana var. ledinghamii, Ph
... (show all)ysostegia virginiana var. parviflora, Physostegia virginiana var. reducta, Physostegia virginiana var. speciosa