Pollen Morphology of the Genus Tragopogon (Asteraceae)

Tragopogon L. (Cichorioideae, Lactuceae, Scorzonerinae) is an Old World genus with 150 species. Pollen morphology has proved useful in the systematics of some genera and species Asteraceae as well that its The pollen 24 taxa was investigated detail by scanning electron microscopy (SEM). grain type ranged from suboblate, oblate-spheroidal to prolate-spheroidal equatorial view hexagonal, obtuse-hexagonal hexagonal-angular polar view. In this study separation sections Majores, Profundisulcati, Sosnovsky, Chromopappus, Rubriflori according Flora Iranica presented other Tragopogon. T. jezdianus, porphyrocephalus, rezaiyensis are suggested belong section. results indicate palynological characters valuable for taxonomic applications classification.