Abstract
The present work is a part of a three years extensive study to observe the annual changes in phyto-sociological characters of Picrorhiza kurroa Royle ex Benth. (Family- Scrophulariaceae) in high altitudinal regions of Kumaun Himalaya, Uttarakhand. The work was undertaken with the objective of observing the annual variation in relative values of frequency, density, abundance and importance value Index (IVI) of the plant species suffering from threats and categorized as critically endangered by International Union for Conservation of Nature (IUCN). Key words: Phyto-sociology, Scrophulariaceae, population, Kumaun, assessment.
Highlights
Phyto-sociology is the study of the characteristics, classification, relationships, and distribution of plant communities
In the phyto-sociological survey it was observed that the Kumaun region of Uttarakhand has a rich floristic wealth where many plant species are prevalent in the socioconsciousness as medicine, fodder, healer etc
It is clear from the observation that P. kurroa
Summary
Phyto-sociology is the study of the characteristics, classification, relationships, and distribution of plant communities. Vegetation units as understood by phytosociologists may express largely abstract vegetation concepts (for example, the set of all hard-leaved evergreen forests of Western Mediterranean area) or actual readily recognizable vegetation types (for example, cork-oak oceanic forests on Pleistocene dunes with dense canopy in SW-Iberian Peninsula). Such conceptual units are called "syntaxa" (singular "syntaxon") and can be set in a hierarchy system called "synsystem" or syntaxonomic system
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