ABSTRACT
Himalaya is credited all over the world as a treasure of medicinal and aromatic plants, which in turn prove as treasures of bioactive agents. These medicinal plants taking refuge in the sub alpine and alpine zones are facing the brunt of varied threats. Strategies have been proposed by various environmentalists to conserve biodiversity at regional, national and global levels. Assessment of plant populations is one of the basic activities of conservation biology that can be mainly valuable for sustaining species with minor populations. In the present study, threat status of the 6 medicinal plant species (Arnebia benthamiI Wall. Ex G. Don, Meconopsis aculeate Royle, Rheum webbianum Royle, Aconitum heterophyllum Wallish Ex Royle, Podophyllum hexandrum Royle and Aquilegia fragrans Benth.) have been assessed in accordance with IUCN Red List Categories and Criteria 2010 version 8.1 following Guidelines for Application of IUCN Red List Criteria at Regional Levels 2003 version 3.0criteria. Out of 6 species, 2 were categorized as vulnerable, 3 species as endangered and 1 species as critically endangered. The three factors of over exploitation, overgrazing and habitat degradation have been known as main threats to the medicinal plants. Consequently, monitoring of population and habitats, development of conservative protocol and establishment of species in-situ conditions has been proposed.