Pathways to polyploidy: indications of a female triploid bridge in the alpine species <i>Ranunculus kuepferi</i> (Ranunculaceae).

Observed differences were highly significant in size classes B [ t (89) = −7.2, P < 0.01] and C1 [ t (89) = −3.3, P < 0.01] (Table 2 ), whereas differences between the pollen from di- and tetraploids in class C2 were only marginally significant [ t (89) = −2.2, P = 0.04].

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