Tephrosia purpurea
Tephrosia purpurea is a species of flowering plant in the family Fabaceae, that has a pantropical distribution. It is a common wasteland weed. In many parts it is under cultivation as green manure crop. It is found throughout India and Sri Lanka in poor soils. Common names include: Uses. In SIDDHA ; SEED uses Anthelmintic ; ROOT uses Nutritive Fish poison. "Tephrosia purpurea" is used as a fish poison for fishing. Its leaves and seeds contain tephrosin, which paralyzes fish. Larger doses are lethal to fish, but mammals and amphibians are unaffected. Ethnomedicine. "Tephrosia purpurea" is also used traditionally as  folk medicine. According to Ayurveda, the plant is anthelmintic, alexiteric, restorative, and antipyretic. It is used in the treatment of leprosy, ulcers, asthma, and tumors, as well as diseases of the liver, spleen, heart, and blood. A decoction of the roots is given in dyspepsia, diarrhea, rheumatism, asthma and urinary disorders. The root powder is salutary for brushing the teeth, where it is said to quickly relieve dental pains and stop bleeding. An extract, termed 'betaphroline' (not a systematic name) is claimed to promote release of endorphins, and finds use in certain cosmetic preparations. African shepherds use crushed plants to  make an antidotal beverage for animals bitten by snakes. Feed and manure. "Tephrosia purpurea" has been reported to provide fodder to animals such as goats. It makes also a good green manure in fields.