INTRODUCTION
Orchidaceae with 25,000 -30,000 species shows a high level of specialization and a great capacity for adaptation to a different environments, which have contributed to the morphological and physiological, vegetative organization, that vary between species (Dressler, 1993;Frander et .al 2017; Udupa ,2011). Orchidaceae is one of the largest family among monocots. Orchidaceae is a second largest flowering plant family of herbaceous, perennials that includes terrestrial ,saprophytic, lithophytic, and epiphytic species (Pridgeonet.al 1993). Orchids are associated with an endophytic symbiotic fungus, mainly in their roots, terrestrial orchids mainly grows in floor of the forest and grassland.
Habenaria Wild is an orchid genus of about 600 species widely distributed throughout the tropical, subtropical and temperate regions of the world. This genus of terrestrial orchids is one of the genera having largest number of species. In India, it is represented by 17 species in Western Himalaya (Jalal and Jayanthi, 2015). InHabenaria Wild. Prominent paired tuberoids with a small third tuberoid is also seen ( Pande et .al . 2010) in this species flowers are highly attractive. The species can be easily identified when in bloom, but the vegetative characteristic (number and size of tubers and leaves, stem height) overlap in many of these. These structural and physiological variations permit plants to survive and reproduce in a variety of environmental conditions and contribute to protection against stress and herbivore damage (Frander et .al 2017.) Particularly in the anatomy of groups are of a descriptive nature, and have focused upon the search for similarities or differences that contribute to the taxonomic determination.