PROBLEMS OF HYBRIDIZATION AND APOMIXIS IN SEED REPRODUCTION of thick-branched willow (<i>Salix dasyclados</i> Wimm.1849 = <i>S. gmelinii</i> Pall. 1789)
The aspects of the taxonomy of the thick-branched willow. Describes the differences in three seed generations of thick-branched willow. Confirmed the possibility of seed reproduction thick-branched willow pollination by alien pollen or conditions non-pollen mode. The high level of individual variability of signs thick-branched willow when seed reproduction in the culture. Confirmed the hypothesis of the allopolyploid origin of the thick-branched willow.