Conifers are the important class of the gymnosperms with 6 living families representing nearly 50 genera and more than 560 species and have been contributing immensely both to the productivity of forests and conservation of sites. Conifers are identified as erect evergreen trees to grow as dense forests, forming a characteristic feature of vegetation of the temperate climate. Some conifers like Junipers grow in extreme climatic and edaphic conditions, either beyond the limit of the tree line (J. communis var. nana), on rocks (J. prostrata) or in the arid cold desert (J. macropoda). Nonetheless, under suitable conditions they grow luxuriantly well and produce exceptionally higher yield. The group is also identified with the tallest (Sequoia sempervirens), oldest (Pinus aristata) and gigantic (Sequoidendron giganteum) trees. Whereas species like Pinus gerardiana yield highly priced edible nuts.