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Pollen grains of 19  Fritillaria  (Liliaceae) taxa and 2 hybrids from Greece were investigated by scanning electron microscopy. The majority of the taxa are studied for the first time and 13 of them are Greek endemic plants. All studied  Fritillaria  taxa had symmetrical, heteropolar and monosulcate grains, with prolate or perprolate shape. Eight types of exine sculpturing were observed: rugulate–reticulate, rugulate–perforate, psilate–perforate, perforate–reticulate, reticulate, reticulate–heterobrochate and psilate–reticulate. The sulcus always extends from distal to proximal and its apex is either round or sharp. The sulcus membrane is rugulate–granulate, psilate–granulate, gemmate or, as in most cases, verrucate. Our study provides new data on the pollen morphology of  Fritillaria , ensures its inter- and intra-specific heterogeneity, and suggests that pollen morphological characters may contribute to the classification of  Fritillaria  taxa at species level.

Studies on the pollen morphology of Fritillaria (Liliaceae) taxa from Greece