Crotalaria retusa in Bengaluru Karnataka India

Crotalaria retusa ( devil-bean, rattle weed) - Fabaceae, considered as poisonous weed. However the roasted seeds are eaten in Vietnam. Also grown as green manure crop. Bangalore, 

Crotalaria retusa is a species of flowering plant in the legume family known by various common names including devil-bean, rattleweed, shack shack, and wedge-leaf rattlepod. It is poisonous to livestock, and contaminates human food. 

Higher classification: Rattlepods 

Order: Fabales

Rank: Species

Family: Fabaceae

Subfamily: Faboideae

Kingdom: Plantae

Roots are used against coughing up blood, leaves mixed with those of C. quinquefolia L. act internally as well as externally against fever, scabies, lung diseases and impetigo. Flowers and leaves are sweet, edible as a vegetable, their alkaloid content being very low.