Photo: Pycnanthemum verticillatum 0.

Gallery: 
Pycnanthemum verticillatum
Photo: Pycnanthemum verticillatum.

Flowering tops. Annala, Helsinki, Finland. Planted. 1999-08-24.

Pycnanthemum verticillatum (Michx.) Pers.
Engl.: whorled mountain mint, American mountain-mint.
Deu.: Amerikanische Bergminze.
Bot. syn.: Koellia pilosa (Nutt.) Britt.

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