Photo: Mentha canadensis 0.
Flowering tops. This one contains at least twice as much menthol as the strongest peppermint, 'Mitcham'. MTT Karila research station, Mikkeli, Finland. Planted. 2001-08-13.
Photo: Mentha canadensis 2.
Photo: Mentha canadensis 1.
Photo: Mentha canadensis 4.
Peppermint and japanese peppermint. True peppermint flowers at the top, Japanese peppermint in the leafnodes. Annala, Helsinki, Finland. Picked. 2005-08-03.