Parmotrema perlatum, commonly known as a black stone flower or kalpasi, is a species of lichen used as a spice in India. The species occurs throughout the temperate Northern and Southern Hemispheres.
- A good pain reliever, Kalpasi helps heal wounds.
- It helps treat skin problems and reduces inflammation.
- It has antibacterial activity and is effective against protozoans.
- It improves digestion and helps suppress respiratory disorders.