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Taxonomic information provides the base line for most of the studies in biological sciences. Most of taxonomic information based on phenotypic characteristics of plants. As phenotypic markers are under the influence of environment, therefore it may leads toward the taxonomic confusion. Therefore, present study was carried out to determine the effect of environment on types of stomata, number, size, and stomata patterning which is very useful feature in taxonomy. In the present study thirty arboreal species of dicot flora (from tropical and subtropical regions) belonging to eight orders and fifteen families are evaluated by using systematic tool i.e. stomatal pattering. Stomata play a vital role in gas exchange of dicot plants. Within dicot flora, eight shapes of stomata are observed (anomocytic, anomotetracytic, actinocytic, amphianisocytic, brachyparacytic, anisocytic, amphicyclocytic and staurocytic). In leaves, the pattern of stomatal distribution is highly variable between arboreal species of dicot but is regulated by a mechanism of one cell spacing between stomata. Epidermal anatomical marker showed the different mode of Review Article Annual Research & Review in Biology, 4(24): 4034-4053, 2014 4035 stomata patterning. Hence, this differential marker can be utilized to differentiate taxonomically complicated species.

Stomatal Patterning: An Important Taxonomic Tool for Systematical Studies of Tree Species of Angiosperm