Leaf epidermis micromorphology of several species of Ferula and Leutea species from Iran

Micromorphological features of the leaf epidermis and stomata were studied in selected species of Ferula and Leutea from Iran using light and scanning electron microscopy (LM and SEM). The aim was to assess the taxonomic value of these characters and to compare them with recent molecular findings regarding the affinities among these genera. Stomatal dimensions, density, and index were quantified and compared among species. Ferula stenocarpa showed the longest stomata and the highest stomatal index, while F. ovina had the widest stomata and Leutea cupularis showed the lowest index. The epidermal cells were mostly irregular or polygonal, with surface textures ranging from striate to smooth or wax-covered. Most species exhibited anisocytic stomata, while F. gummosa displayed anomocytic types. These micromorphological patterns support the close relationship between Ferula and Leutea, and provide evidence consistent with the reclassification of Dorema within Ferula. The results highlight the diagnostic value of epidermal micromorphology in delimiting species and understanding phylogenetic relationships within the Apiaceae.

کلیدواژه ها:

Apiaceae ، Anatomy ، Cuticle ، stomata ، Taxonomy ، Umbelliferae