Difference Between Pinus roxburghii And Pinus wallichiana 

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In this Video Difference Between Pinus roxburghii And Pinus wallichiana is discussed Pinus wallichiana (Blue pine) has needles in fasicles of 5 where as in Chilgoza pine it is 3 needles. Chir Pine (Pinus roxburghii) is a tree in lower Himalayas (elevation from 800m to 1900m). ... Hence fire occurence is less in Blue pine forests.