Published Paper Details:

The lichen Parmelia perlata, often called black stone flower or Chharila, is a member of the Parmeliaceae family. It is spreading over the steep region of the Himalaya and North East India, growing in between the rocks, tree trunks, and ground. The plant's exterior coat is greenish black and white, and the thallus, which can grow up to 15 cm in diameter, is only weakly attached to the substrate. Its smooth upper surface is orbicular greyish white, while the lower surface is backish brown and hairy. Usnic acid, lecaronic acid, salazinic acid, and atronin, among other unique chemical components discovered in the lichen, have been traditionally given for bronchitis, excessive salivation, vomiting, toothaches, boils, and other inflammations, Aside from these conditions, it has also been linked to seminal weakness, nocturnal emission, amenorrhea, leucorrhea, dyspepsia, calculi, blood and heart conditions, stomach problems, enlarged spleen, bleeding piles, scabies, leprosy, general aches, etc. It strengthens the urinary system and inhibits the development of calculi. The primary goal of the current manuscript is to discuss the pharmacognostic information and pharmacological activity of this lichen.