Pharmacognostical evaluation of leaf of Bada Rasna [Nelsonia canescens (Lam.) Spreng.; Acanthaceae].

Nelsonia canescens (Lam.) Spreng. (Acanthaceae), a well-known plant in traditional systems of medicine, known as "Bada Rasna" by the traditional practitioners of Odisha, is being used as Rasna for managing pain and inflammation.