WATER Mint SEEDS, PERENNIAL HERB
Leaves can be eaten raw or cooked (but they are strong). Water mint has a strong distinctive peppermint-like fragrance that is used best as a flavoring in salads or cooked foods; however, some people may find it far too pungent to use as a flavoring. A relaxing herbal tea can be made from the leaves.
Water mint grows around water and is easy to recognize by its round flower head at the apex of the plant. Being a mint it has a square stem and opposite pairs of leaves alternating at 90 degrees to the pair above or below on the stem.
Flowerheads have pink to lilac clusters of tiny flowers on the stem where the leaves join and one terminal cluster at the top of the stem. The corolla is slightly zygomorphic, it measures about 5 mm (0.2”) long, and is 4-lobed. The calyx is narrowly campanulate, 5-lobed, grooved, and 13-veined. It has four stamens almost of even length, yet longer than the corolla. Water mint flowers in mid to late summer.
Water mint leaves are thick, ovate with serrated edges. They can be totally green to having purple edges and veins; and can be hairy or smooth. They grow opposite and they are almost glabrous.
This mint grows anyway from 30 to 60 cm (12 to 25”). The square stem is erect–ascending, unbranched–branched, can be hairy or smooth and it is often dark reddish.
Being an aquatic plant this mint likes slow moving fresh water, ponds and lakes. Sometimes they will grow in swamps, marshes, fens, damp woodlands, and storm ditches.