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The structure of the karyotype is proposed for Potentilla subsect. Collinae Juz. There are not the marker chromosomes characteristic for studied taxa of this subsect. of karyotaxonomic meaning. For taxa of P. subsect. Collinae: P. wimanniana Günther et Schummel (2n = 35) and P. leucopolitana var. schultzii f. koernickei T. Wolf (2n = 35), the number of chromosomes are reported for the first time. Chromosome numbers for the following taxa of this subsect. from Poland: P. collina Wibel s. stricto (2n = 35) and P. leucopolitana P.J. Müller (2n = 35) are counted for the first time. Chromosome numbers are found in taxa related to P. subsect. Collinae, i.e. P. incana P. Gaertner, B. Meyer & Scherb. (2n = 28) and P. argentea L. (2n = 35). In seedlings of P. thyrsiflora Hülsen ex Zimmeter, from among three noted chromosome numbers 2n = 21, 28 and 35 there is not one dominant.

Chromosome numbers of Potentilla subsect. Collinae (Rosaceae) from Poland