Notes on Identity of Picrorhiza - A High Value Threatened Medicinal Plant Group of Western Himalaya

A review of three species of genus Picrorhiza Royle (Veroniceae) presented here in view of the taxonomy, ecology and phytochemistry. The prime objective of the paper is to differentiate these three species to avoid high scale adulterants in herbal industry and to use correct species for the most efficacy in the Ayurvedic system of medicine.