English name:
Grass-leaved sweet rush.
Description:
Perennial semi-aquatic herb. Rhizome aromatic, creeping and much-branched. Leaves long and amplexicaul, in fascicles; principal nerves parallel. Inflorescence in spike
on a compressed scape, surrounded by a long bract; flowers small, bisexual. Berry bright-red when ripe.
Other species, such as Acorus calamus L. and A. gramineus Soland. var. pusillus Engl. are also used medicinally.
Flowering period:
March - June.
Distribution:
Grows wild on the banks of mountain streams.
Parts used:
The rhizomes, collected in autumn and winter, are sun-dried or heat-dried. The leaves are also used.
Chemical composition:
The rhizome contains an essential oil consisting of asaron and asaryl aldehyde; and a bitter glucoside, acorin.
Therapeutic uses:
The rhizome possesses pectoral, stomachic and sedative properties. It is utilized in the therapy of diarrhoea, gastralgia, cough, bronchial asthma, neurasthenia, fever, convulsions, rheumatism, osteodynia and arrhythmia. The daily dose is 3 to 8g in the form of a decoction, powder and pills, for a period of 1 to 2 months. External application is effective for dermatosis and haemorrhoids. It is also used as an insecticide for killing lice, bugs and fleas.
Source:Medicinal plants in Viet Nam (Institute of Materia Medica - HANOI - WHO/WPRO, 1990, 444 p.)
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