Palynological study of Scorzonera doria and Hieracium hoppeanum (Cichorieae - Asteraceae) in Albania

Abstract

This paper presents the morphological features of the pollen grains of Scorzonera doria and Hieracium hoppeanum and the comparison of these features with other species of the genus Scorzonera L. and Hieracium L. The material for the study was taken from the National Herbarium in Tirana. Acetolysis and basic fuchsine methods were used to study the morphological features of Scorzonera doria and Hieracium hoppeanum pollen grains. The fixing of the pollen grains is made with glycerin gelatin. A light microscope was used to take photos and study the morphological features of the pollen grains. From the study of pollen grains of Scorzonera doria and Hieracium hoppeanum, results that they are tricolporate. The shape of pollen grains according to their outline is spheroidal and oblate-spheroidal. The exine appears thick, two-layered and its ornamentation is echinolophate.