Mentha longifolia (horse mint; syn. M. spicata var. longifolia L., M. sylvestris L., M. tomentosa D'Urv, M. incana Willd.) is a species in the genus Mentha (mint) native to Europe excluding Britain and Ireland, western and central Asia (east to Nepal and the far west of China), and northern and southern (but not tropical) Africa.
It is a very variable herbaceous perennial plant with a peppermint-scented aroma. Like many mints, it has a creeping rhizome, with erect to creeping stems 40–120 cm tall. ...
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* Al information er baseret på offentliggjort videnskabelig forskning