Physostegia speciosa (A.Gray) Bergmans species accepted

Physostegia correlliae (Lundell) Shinners species accepted

Dracocephalum virginianum L. species synonym

Physostegia virginiana f. virginiana form synonym

Dracocephalum correlliae Lundell species synonym

Physostegia virginiana (L.) Benth. species accepted

Physostegia longisepala P.D.Cantino species accepted

Physostegia parviflora Nutt. ex A.Gray species accepted

Physostegia nuttallii (Britton) Fassett species synonym

Physostegia virginiana var. parviflora (Nutt. ex A.Gray) B.Boivin variety synonym

Dracocephalum nuttallii Britton species synonym

Physostegia digitalis Small species accepted

Physostegia pulchella Lundell species doubtful

Physostegia angustifolia Fernald species accepted

Physostegia edwardsiana Shinners species synonym

Physostegia leptophylla Small species accepted

Physostegia aboriginorum Fernald species synonym

Dracocephalum veroniciforme (Small) Small species synonym

Physostegia veroniciformis Small species synonym

Dracocephalum leptophyllum (Small) Small species synonym

Physostegia correllii (Lundell) Shinners species accepted

Dracocephalum correllii Lundell species synonym

Physostegia godfreyi P.D.Cantino species accepted

Physostegia ledinghamii (B.Boivin) P.D.Cantino species accepted

Physostegia virginiana var. ledinghamii B.Boivin variety synonym

Physostegia purpurea (Walter) S.F.Blake species accepted

Dracocephalum purpureum (Walter) E.M.McClint. ex Gleason species synonym

Physostegia obovata (Elliott) R.K.Godfrey ex Weath. species synonym

Physostegia intermedia (Nutt.) Engelm. & A.Gray species accepted

Dracocephalum intermedium Nutt. species synonym

Physostegia micrantha Lundell species accepted

Moldavica parviflora (Nutt. ex A.Gray) Britton species synonym

Physostegia truncata Hook., 1836 species accepted

Physostegia micramona Lundell species synonym

Physostegia louisiana Karsch species accepted

Prasium purpureum Walter species synonym

Physostegia virginiana var. obovata (Elliott) A.Gray variety synonym

Dracocephalum obovatum Elliott species synonym

Physostegia intricata Hook., 1835 species synonym

Physostegia denticulata Benth., 1829 species accepted

Dracocephalum veroniciformis (Small) Small species synonym

Physostegia obovata (Elliott) R.K.Godfrey species homotypic synonym

Dracocephalum purpureum (Walter) E.M.McClint., 1952 species synonym

Physostegia parviflora Nutt. species homotypic synonym

Physostegia imbricata Benth. species heterotypic synonym

Physostegia parviflora Nutt. ex DC. species homotypic synonym

Physostegia parviflora Nutt. ex Benth., 1848 species doubtful