Botanical Name :- Operculina turpethum (L.) Silva Manso, Family :- Convolvulaceae.
Synonyms :- Ipomoea turpethum (L.) R. BR., Ipomoea turpethum var. anceps (L.) Miq., Operculina turpethum var. heterophylla Hallier f., Spiranthera turpethum (L.) Bojer, Merremia turpethum (L.) Rendle, Convolvulus turpethum L., Argyreia alulata Miq.
Regional Name :- English :Terpeth Root, Indian Jalap, Hindi : Nishothra, Sanskrit : Syama, Tribhandi, Urdu : Turbud, Nishoth, Punjabi : Nisoth, Gujrati : Kala Nasottara, Bengali : Teudi, Tvuri, Dhdhakalami, Kannada :Vili Tigade, Malayalam :Trikolpokanna, Marathi :Nisottar, Oriya : Dudholomo, Tamil : Karum Sivadai, Telugu :Tella, Tegada.
Part Used :- Root.
Description :- Nisoth is found in Africa, Australia and Tropical Asia and throughout the warmer parts. Within India it is found growing wild nearly throughout the country, ascending up to 900 m, also occasionally grown in gardens. Trivrt is a large perennial twiner with milky juice and fleshy roots,; the roots being fleshy, care is taken in drying as they decay easily; roots therefore cut into pieces and the cut portions are exposed to sun for a day or so, after which it is finally dried in shade. Roots occur in pieces, 1.5-15 cm long, 1-5 cm dia., usually unbranched, cylindrical, elongated, bearing thin rootlets; thicker pieces, occasionally split and show central wood portion; surface dull grey, reddish-grey to light brown, showing deep furrows or longitudinal wrinkles giving a rope-like or columnar appearance; transversely cut surface shows thick, whitish bark and light yellow centre; fracture in bark, short; in wood, fibrous; odour, indistinct; taste, slightly acrid and nauseating when kept in mouth for some time.
Phytoconstituents :- Main chemical constituents of Nisoth are Resinous Glycosides. It contains A and B- Turpethins, Scopoletin, Turpethinic acids A, Turpethin, Scopoletin, coumarin. etc
Ayurvedic Properties :- Rasa : Madhura, Katu, Tikta, Kasaya, Guna :Laghu, Ruksa, Tiksna, Vipaka :Katu, Virya :Usna, Karma :Kaphapittahara, Pittahara, Vatala, Virecana, Sukhavirecanaka, Jvarahara.
Ayurvedic Applications :- Malabandha, Gulma, UdaraRoga, Jvara, Sopha Pandu, Pliha, Vrana, Krmi, Kustha, Kandu.
Medicinal Uses :- Nisoth is useful in easy purgation, it helps in losing weight, worm infestation, infected wounds, ascites, leukoderma, fever, inflammation, anaemia, haemorrhoid, gout, bronchitis, pain in muscles, joints and in the chest. It is also used in early stage of liver disorders, Disease of the spleen, Splenomegaly, useful in heart disorders, relieves bloating, piles , constipation, gas distension in abdomen.