Water mint, Mentha aquatica
These plants can grow in water up to 15cm deep, they are also found in moist soil near streams and ponds.
The leaves are edible raw or cooked. A strong distinctive peppermint-like fragrance. Used as a flavouring in salads or cooked foods. The leaves are too pungent for most people to use as a flavouring.
A herb tea is made from the leaves.
A tea made from the leaves has traditionally been used in the treatment of fevers, headaches, digestive disorders and various minor ailments. It is also used as a mouthwash and a gargle for treating sore throats, ulcers, bad breath etc. The leaves are harvested as the plant comes into flower and can be dried for later use.
The essential oil in the leaves is antiseptic, though it is toxic in large doses.
The plant repels flies, mice and rats.
It has a pleasant, fresh scent and was formerly used as a strewing herb and has been strewn in granaries to keep mice and rats off the grain.
The plant, harvested before flowering, yields about 0.8% essential oil.
The fresh or dried plant is very good when used in herbal baths and can also be used in herb pillow.