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Betula utilis and its varieties

Betula utilis and its varieties

Plantsman 7(2): 116-125

B. jacquemontii from west Himalaya and B. utilis from E Nepal, Sikkim, Bhutan and SW China are usually differentiated on colour of bark and the number of veins in the leaf. Morphological studies of plants throughout the range of both species have shown, however, that there is a continuous gradient (a cline) in these characters from one end of the distribution to the other. It was concluded that B. jacquemontii should be subordinated to B. utilis at varietal rank.

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