The present study highlights effects of deforestation on species composition of forest floor vegetation between the elevations of 1850-2000 m in Kumaun Himalaya. The species composition changed form forested site to totally deforested site. The moderate level of disturbance increased the species richness (25 to 31 species) but severe disturbance caused a drastic reduction (12 species). Species diversity decreased with increasing level of disturbance (3.82 in forested site to 1. 51 in deforested site). Erect forbs were the dominant growth forms in forested site and grasses and sedges showed dominance in partly deforested and totally deforested sites.