Adhatoda zeylanica

Justicia adhatoda, commonly known in English as Malabar nut, adulsa, adhatoda, vasa, or(বাসক) vasaka, is a medicinal plant native to Asia, widely used in Siddha Medicine, Ayurvedic, homeopathy and Unani systems of medicine. The plant's native range is the Indian subcontinent (Assam, Bangladesh, India, Nepal and Sri Lanka), Laos and Myanmar. It has been introduced elsewhere. Justicia adhatoda is a shrub with lance-shaped leaves 10 to 15 centimeters in length by four wide. They are oppositely arranged, smooth-edged, and borne on short petioles. When dry they are of a dull brownish-green colour. They are bitter-tasting. When a leaf is cleared with chloral hydrate and examined microscopically the oval stomata can be seen. They are surrounded by two crescent-shaped cells at right angles to the ostiole. The epidermis bears simple one- to three-celled warty hairs, and small glandular hairs. Cystoliths occur beneath the epidermis of the underside of the blade.