Lower Taxa Pycnanthemum albescens Torr. & A. GrayPycnanthemum albescens x muticum Pycnanthemum albescens x pilosum Pycnanthemum muticum (Michx.) Pers.Pycnanthemum pilosum Nutt.Pycnanthemum tenuifolium Schrad.Pycnanthemum torrei Benth.Pycnanthemum virginianum (L.) T. Durand & B.D. Jacks. ex B.L. Rob. & Fernald
Lower Taxa
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