Abstract
This study included the anatomical characteristics of the leaves of two
species Launeae mucronata L. and Picris babylonica L. belong to Asteraceae
family . The study included the dimensions of epidermal cells, stomata and
surface covering, as well as qualitative characteristics such as the shapes and
thickness of epidermal cells, which also had a great taxonomic value in
distinguishing between the two types, as it was noted that the average number
of stomata of the upper and lower epidermis between the two studied species.
A non – glandular trichomes with hook-shaped ends were observed on the
upper and lower epidermis of Picris babylonicaL and multicellular non –
glandular trichomes with rounded ends longer than the first one, while the upper and
lower epidermis in Launeae mucronata is devoid of trichomes.. It is worth noting
that the frequency of stomata and trichomes was estimated in each microscope
field under the power of magnification 40x (the number of stomata and
trichomes in each microscope field ) and Stomatal index was found for tow
studied species
Main Subjects
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