The fruit and seed morphologies of five taxa (Al. desertorum Sapf., Al. linifolium Stephan ex. Willd. var. teheranicum Bornm., Al. minus (L.) Rothm. var. minus, Al. strigosum Banks & Sol. subsp. cedrorum (Schott & Kotschy) and Al. strigosum Banks & Sol. subsp. strigosum) belonging to Alyssum L. were investigated with scanning electron microscopy (SEM) in order to determine the significance of fruit and seed features as taxonomic characters. This study presents macro-and micromorphological characters, including seed shape, winged, measures, epidermal cell pattern and fruit shape, colour, measures, trichome morphology. Three epidermal cell patterns were observed; micro-reticulate, normal-reticulate, rugose-foveate and the same number trichome morphologies were distinguished; glabrous, monomorphic (stellate), dimorphic (bifurcate and stellate). The results showed that the morphological characteristics of fruit and seed could be used as criteria to distinguish taxa.