Synonyms
Pycnanthemum leptodon A.Gray
Pycnanthemum torreyi var. leptodon (A.Gray) Boomhour ex Fernald & B.G.Schub.
Pycnanthemum dubium A.Gray
Pycnanthemum tullia var. dubium (A.Gray) A.Gray
Koellia verticillata var. pilosa Kuntze
Koellia verticillata var. glabrior Kuntze
Koellia leptodon (A.Gray) Kuntze
Koellia dubia (A.Gray) Briq.