The study examines the diversity and usage patterns of 256 ethno-medicinal plant species from the Kumaun Himalaya, highlighting their roles in traditional medicinal systems. It categorizes the plants according to families, life forms, and various parts used for treatment of different ailments, revealing significant reliance on local flora among various ethnic groups. The paper underscores the urgency to document this indigenous knowledge in the face of environmental degradation and increasing interest in plant-based medicines.