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ThesisItem Open Access Bark morphology of trees of Pantnagar and its taxonomic implication(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2021-02) Chhabra, Ayushi; Rawat, D.S.Variety of trees exists in nature and their identification can be done by knowing some specific taxonomic characteristics. The general floristic literature utilizes reproductive structures mainly to identify trees though, these structures are difficult to access and study in tall trees and may not be available every year or throughout the year. However, bark is always available, accessible and can be used to identify trees. There are specific features on each tree bark that varies from species to species and observing these features helps in identification of trees. Present study was conducted to understand the morphology of bark among the trees of Pantnagar as well as to develop database of images of barks of trees to facilitate identification through their bark. Bark morphology of 105 tree species of Pantnagar area (31% of tree species of Uttarakhand) belonging to 84 genera, 42 families and 23 orders were studied. Out of the 105 tree species, 7 are Gymnosperms, 8 are Monocots and 90 are Dicots taxa. Each tree species with their correct scientific name, vernacular name, images and description of the bark and stem base is provided in the work. Study revealed a great range of variation in tree barks with no two trees having same bark structure. Depending upon the nature of barks studied 105 tree species were classified into 8 categories namely smooth bark, lenticellate bark, bark with scales and plates, bark peeling in curly strips, bark with vertical cracks, vertically striped bark, ridged and furrowed bark, and rough and rugose bark. „Rough and rugose‟ category of bark is largest with 40 tree species categorized under it, followed by the category „vertical cracks‟ having 34 species, „lenticellate‟ with 25 species, „smooth‟ with 24 species, „ridged and furrowed‟ with 12 species, „vertical strips‟ with 6 species, and scales and plates‟ with 4 species. Lowest number of species was recorded under the category „peeling strips‟ which is represented by solitary species Araucaria columnaris (J.R. Forst.) Hook. Bark textures were uniform for particular tree species in study area and act as visual marker for tree identification. The diversity observed in the bark morphology proved a valuable character in identification of trees and can be used with other traditional taxonomic characters, or alone, for correct identification.
