Abstract

Natural populations of Polygonatum verticillatum in Kumaun Himalaya were surveyed for population studies, habitat assessment and threat status. This research reveals density of individuals and area occupied were low as compared to other species of the region, indicating habitat loss and heavy exploitation. Status was determined on a site-to-site basisfor the entire Kumaun region. Based on species occurrence in selected areas, the species were identified as critically endangered to endangered in different areas. Frequency of P. verticillatum ranged between 50 and 80% at different population sites. Distribution of the species was between 50 and 80% indicating contiguous distributional range at most of the sites and random distributional range at Mukteshwer and Gagar. Density of P. verticillatumwas highest (4.40 plant m^-2) in way to Kafani and lowest (2.60 plant m^-2) in Bhaman gupha.Total basal cover (TBC) was also found highest (0.91 cm² m^-2) in way to Kafani and lowest (0.35 cm² m^-2) in Bhaman gupha. Important value index (IVI) was found highest (51.68) in Munsyari and lowest (28.84) in Khati. Concentration of dominance (Cd) for the region showed a slight variation, with a range between 0.30 and 0.10. This may be attributed to the narrow range of distribution, habitat restriction and dominance of some species.

Key words: Population, habitat, threat, Polygonatum verticillatum.