Specific features of development of the male generative organs in clones of the Siberian stone pine (Pinus sibirica De Tour) of different origins in the Krasnoiarsk forest-steppe

The development of male generative organs of the Siberian stone pine clones of different origin was analyzed in the Krasnoyarsk forest-steppe for many years. Geographical and individual variability was described as concerns the number of microstrobils and pollen variability. The beginning of "flowering", abundance of microstrobils, and their regular formation were shown to markedly vary and, all other conditions being equal, be determined by the presence of clones, their hereditary features, and environmental conditions, as well by the influence of stock.