Pollen morphology of eight species of Saxifraga, i.e. S. cespitosa, S. oppositifolia, S. cernua, S. nivalis, S. aizoides,S. rivularis, S. hieraciifolia, and S. hirculus, collected from Ny-Ǻlesund, Svalbard, Arctic was examined using light and scanning
electron microscopy. Pollen grains of Saxifraga species are subprolate or prolate, 3-colpate, 220.127.116.11 μm in the polar axis,
18.104.22.168 μm in the equatorial axis, and show a P/E ratio 22.214.171.124. On the basis of exine ornamentation, four pollen types,
viz., the S. oppositifolia type (striate without scabrae on the muri), S. cernua type (striate with scabrae on the muri), S. nivalis
type (microreticulate and operculum absent), and S. cespitosa type (microechinate and operculum present), were recognized.
Hierarchical cluster analysis of the pollen morphological characters indicated that pollen morphology supports the infrageneric
classification of the genus Saxifraga