Introduction to Biodiversity; Spatial Patterns of Terrestrial Biodiversity; Diversity of Lichens in the Valley of Flowers National Park, India; Floristic Diversity Along an Altitudinal Gradient in the Central Part of Himachal Pradesh, North West Himalaya; Natural Regeneration Status of Silver Fir and Spruce Forests in Himachal Pradesh; GC-MS Studies and in-vitro and in-vivo Biological Activities of Solvent Extracts of Mokkathotapapada Leaves of Piper betel L. Cv. Kapoori, a Local Cultivar; RNA Interference; Trichoderma