Nasturtium officinale Health Dictionary

R. Br.

Synonym: Rorippa nasturtium- aquaticum (Linn.) Hayek.

Family: Cruciferae; Brassicaceae.

Habitat: Cultivated in Bengal, Orissa and Punjab.

English: Watercress.

Folk: Piriyaa-Haalim (Punjab), Latputiyaa (Maharashtra).

Action: Leaves—antiscorbutic, expectorant (used in catarrh of the respiratory organs), diuretic (used in kidney and bladder disorders), detoxifying. A lotion of leaves is applied to blotches, spots and blemishes. Fresh herb is used as a blood purifier.

Key application: For catarrh of respiratory tract. (German Commission E.)

Watercress contains vitamin A 4720 IU, ascorbic acid 77 mg/100 g, also thiamine, riboflavin, niacin and biotin; mineral matter 2.2%—calcium 290, phosphorus 140, iron 4.6 mg/100 g, also sulphur, iodine, manganese, zinc, arsenic and copper; proteins 2.9%, amino acid composition includes leucine, phenylalanine, valine, lysine, tyrosine, alanine, threonine, glutamic acid, serine, aspartic acid, cystine, methionine sulphoxide and proline.

The glucosinolate phenethyl isothio- cyanate, which is released upon chewing the leaf, is a chemopreventive agent against lung cancer. (cited in Expanded Commission E Monographs.)

Watercress is contraindicated in gastric and duodenal ulcers and inflammatory kidney diseases. (Francis Brinker.)