The Eastern Himalayan range is a complex mountainous landscape with subtropical monsoonal and temperate weather. The snow-covered peaks clothed with alpine vegetation, followed by coniferous forests, diverse broad-leaved temperate forests, wet evergreen forests to low-elevation evergreen and riparian forests and grasslands along the braided rivers make the Eastern Himalayas exploding with high diversity. We explore and document plant diversity across diverse forests from the foothills of E. Himalayan region covering the forests of West Bengal, Sikkim, Assam and Arunachal Pradesh. We also document the habitat quality and geographical distribution of plants in order to conserve the forests. This will have a greater implication in conservation planning in the Himalayan and Indo-Burma global hotspots of biodiversity of India.