Two new subspecies of Campanula rotundifolia L. described from North Europe and lectotypification of C. rotundifolia f. lapponica Witasek and f. pusilla Saelán
Two new diploid (2n=34) subspecies of Campanula rotundifolia L. are described from North Europe. C. rotundifolia subsp. fennica Piirainen & Nurmi is native in the southern half of Finland, adjacent parts of the Karelian Republic (Russia), northern Estonia and the Baltic Islands (Sweden, Estonia, Russia). Its habitats are cliffs and eskers, in the Baltic area also alvars. It is ahemerobic or even hemerophobic. C. rotundifolia var. latifolia Brenner and f. pusilla Saelán (nom. illeg.), are synonymized under it; the latter is also lectotypified. The other new subspecies, subsp. kemensis Piirainen & Nurmi, is known from the northern half of Finland, adjacent Sweden, Finnmark (North Norway), and the Kola Peninsula (Russia). The native habitats are alluvial river shores and cliffs. As an apophyte, it grows also in meadows, hayfields, roadsides and villages. In addition, a lectotype is chosen for C. rotundifolia f. lapponica Witasek, a northern diploid form described based on East Fennoscandian material. The original material in H consists of specimens belonging to three different taxa or their intermediates. The lectotype was chosen in accordance with the original description to stabilize the use of the name. The name is synonymized to the newly described subsp. kemensis, representing one extreme end of its variation.