Great Water Plantain, ZE-XIE, European water plantain, American water plantain, Northern water plan

Alisma plantago-aquatica

Physical Characteristics

Alisma plantago-aquatica is a PERENNIAL growing to 0.9 m (3ft) by 0.5 m (1ft 8in). See above for USDA hardiness. It is hardy to UK zone 6. It is in flower from June to August, and the seeds ripen from July to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Flies. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers wet soil and can grow in water.

Distribution

Northern temperate regions of Europe, including Britain, Asia and America.

Habitats

Pond; Bog Garden;

Edible Uses

Edible Parts: Leaves Root Edible Uses: Root - cooked[13, 46, 61, 74]. Rich in starch[114]. Caution is advised, the root is acrid if it is not dried or well cooked before use[2, 183]. Leaves and petioles - must be thoroughly cooked. They require long boiling and have a salty flavour[105, 179].

Medicinal Uses

Antibacterial Anticholesterolemic Astringent Contraceptive Diaphoretic Diuretic Dysentery Hypoglycaemic Hypotensive Leprosy Rubefacient The leaves are antibacterial, anticholesterolemic, diaphoretic, diuretic, hypoglycaemic and hypotensive[4, 147, 176]. They are used in the treatment of cystitis, dysentery, renal calculus, gravel etc[4]. The fresh leaf is rubefacient[222]. It is used in the treatment of leprosy[218] and is also applied locally to bruises and swellings[4]. Dried stem bases eaten, or grated and taken with water in treating digestive disorders such as heartburn, cramps and stomach flu[257]. The powdered seed is an astringent, used in cases of bleeding[4]. The seed is also said to promote sterility[218]. The root contains an essential oil and has a wide range of medicinal uses[176, 218, 283]. It is antibacterial, anticholesterolemic, diuretic and hypotensive[176]. It is said to lower blood pressure, cholesterol and blood sugar levels[238] whilst it also has an antibacterial action on Staphylococcus, Pneumococci and Mycobacterium[176]. The root is used in the treatment of oliguria, oedema, nephritis, acute diarrhoea, cholesterolaemia and fatty liver[176]. It has been thought of as a cure for rabies, though this has not been substantiated[4]. The whole plant is believed to promote conception[218]. The root is harvested before the plant comes into flower and is dried for later use[238]. A homeopathic remedy is obtained from the fresh root[4].

Known Hazards

The fresh leaves and roots are toxic but the toxic principal is destroyed by heat or by drying[13, 46]. The seed is said to promote sterility. By contrast it is also said to promote conception [301].