In this study, diatoms in epipsammic samples, which were taken from two stations selected in Kelkit Creek (Tokat/Turkey) between March and December 2018, were analyzed. During the study, a total of 25 taxa belonging to diatoms were recorded. The diatom species represented by the highest number of taxa were Cymbela (4 taxa), Nitzschia (4 taxa), and Navicula (3 taxa). Sorensen similarity index be...

Gypsophila is the fourth biggest genus of Caryophyllaceae. Presence or absence of indumentum on different parts of the plant is one of the most important diagnostic characters between the species of this genus. The indumentum of 13 taxa of this genus were examined using scanning electron microscopy. All taxa had multicellular and glandular trichomes. Size of trichomes can represent as distingui...