Intraspecific polyploidy of Parnassia palustris var. multiseta (Saxifragaceae s.l.) collected in Primorye and Altai Territories, Russia

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Forty plants of Parnassia palustris var. multiseta collected in nine localities in Russia were studied in chromosome botany. They showed differentiation of the somatic chromosome numbers of 2n=18, 27 and 36, that could be diploid, triploid and tetraploid, respectively, of which the chromosome number of 2n=27 was reported here for the first time. The plants of 2n=18 and 36 chromosomes had commonly high pollen stainability and showed significantly different pollen grains in size from each other.