Pycnanthemum albescens Torr. & A.Gray species accepted

Pycnanthemum beadlei (Small) Fernald species accepted

Pycnanthemum californicum Torr. ex Durand species accepted

Pycnanthemum clinopodioides Torr. & A.Gray species accepted

Pycnanthemum curvipes (Greene) E.Grant & Epling species accepted

Pycnanthemum flexuosum (Walter) Britton, Sterns & Poggenb. species accepted

Pycnanthemum floridanum E.Grant & Epling species accepted

Pycnanthemum loomisii Nutt. species accepted

Pycnanthemum monotrichum Fernald species accepted

Pycnanthemum montanum Michx. species accepted

Pycnanthemum muticum (Michx.) Pers. species accepted

Pycnanthemum nudum Nutt. species accepted

Pycnanthemum pycnanthemoides (Leavenw.) Fernald species accepted

Pycnanthemum tenuifolium Schrad. species accepted

Pycnanthemum torreyi Benth. species accepted

Pycnanthemum verticillatum (Michx.) Pers. species accepted

Pycnanthemum virginianum (L.) T.Durand & B.D.Jacks. ex B.L.Rob. & Fernald species accepted

Pycnanthemum setosum Nutt. species accepted

Pycnanthemum incanum (L.) Michx. species accepted