It was carried out a comparative analysis of the crown morphogenesis of upright and prostrate growth form of  Siberian stone pine on intrazonal distribution limits associated with temperature (the upper limit in the mountains) and soil moisture (forest-bog ecotones). On the example of ecotone "subalpine forest - mountain tundra" in the Central Altai shown that high winds with little snow cover contribute to formation of the low-level multistem trees. Increasing the thickness of the snow cover and decreasing of the wind speed lead to the formation of the combined crown consisting of nival prostrate and vertical parts giving rise to a typical kind of tree form. The crown morphogenesis in upland swamps area (southern West Siberian taiga subzone) is due to the specific micro relief of the peat hillock formed by several species of Sphagnum mosses differing in morphology and growth rate. Upright growth form had trees growing in the central part of the peat hillock where dominates slow-growing S. fuscum.  Prostrate growth form had trees growing in the peripheral part of the peat hillock where dominates fast-growing S. magellanicum. It is shown that ability to create multilevel adventitious root system plays a determinative role in the surviving of Siberian stone pine in upland swamps areas.