Photo: Mentha longifolia 5.

Flowers with 4 butterflies. Helsinki, Finland. Planted. 2003-09-08.
Mentha longifolia (L.) Hudson Engl.: silver mint, biblical mint, horsemint, wild mint. Deu.: Ross-Minze, Silberminze. Suom.: harmaaminttu. Sven.: gråmynta. Bot. syn.: Mentha sylvestris L.
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Photo: Mentha longifolia 5.