University of Kirkuk Kirkuk University Journal for Agricultural Sciences (KUJAS) 2221-0482 13 4 2022 12 01 Comparative anatomical study of leaves epidermis for Launeae mucronata L. and Picris babylonica L. species (Asteraceae) in Tikrit City/ Iraq 192 199 177473 10.58928/ku22.134117 EN Zahraa B. Muhammed Bio.Dept. College of Education for Women Bio.Dept. College of Education for Pure Science Kirkuk University Wijdan S. Aziz Bio.Dept. College of EducationTikrit University Journal Article 2022 09 22 This study included the anatomical characteristics of the leaves of two<br />species Launeae mucronata L. and Picris babylonica L. belong to Asteraceae<br />family . The study included the dimensions of epidermal cells, stomata and<br />surface covering, as well as qualitative characteristics such as the shapes and<br />thickness of epidermal cells, which also had a great taxonomic value in<br />distinguishing between the two types, as it was noted that the average number<br />of stomata of the upper and lower epidermis between the two studied species.<br />A non – glandular trichomes with hook-shaped ends were observed on the<br />upper and lower epidermis of Picris babylonicaL and multicellular non –<br />glandular trichomes with rounded ends longer than the first one, while the upper and<br />lower epidermis in Launeae mucronata is devoid of trichomes.. It is worth noting<br />that the frequency of stomata and trichomes was estimated in each microscope<br />field under the power of magnification 40x (the number of stomata and<br />trichomes in each microscope field ) and Stomatal index was found for tow<br />studied species https://kujas.uokirkuk.edu.iq/article_177473_21b23cdb8458aaca04fa6433dfacf177.pdf