water mint

noun

1. a Eurasian mint plant, Mentha aquatica, of marshy places, having scented leaves and whorls of small flowers

Example Sentences

Other plants to have colonised the site include common reed, greater pond sedge, celery-leaved buttercup, marsh valerian, purple and yellow loostrife, yellow flag iris, fen bedstraw and water mint.

From BBC

But those which perfume the air most delightfully, not passed by as the rest, but being trodden upon and crushed, are three, that is burner, wild thyme, and water mints.

From Project Gutenberg