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MICROMORPHOLOGICAL CHARACTERISTICS ON THE GENUS
ORIGANUM L. SECT. MAJORANA (Miller) Bentham IN TURKEY
Narin SADIKO�LU, Azize TA�
University of �nönü, Faculty of Pharmacy, Department of Pharmacognosy, Malatya narin@inonu.edu.tr
Most of the members of the Labiatae family have economic importance as they include
secondary metabolites such as essential oils. Most of these plants known as oregano which
includes 5 genera from this family are from the genus Origanum L. Of the 9 taxa exported
under the name of oregano, 5 are from the genus Origanum. Origanum species are divided
into 10 sections and three of the taxa, [O. majorana L., O. onites L., O. syriacum L.subsp.
bevanii (Holmes) Ietswaart] too, that are in the section Majorana (Miller) Bentham are
exported. In order to distinguish the members of the section Majorana easily, which can
easily be distinguished from the others as it has 1-lipped calyces that similar to the bracts,
their micromorphological characteristicss have been throughly examined. O. majorana is the
taxon with the biggest stomata in size and the smallest diameter in the Labiatae type secretion
cell. Labiatae type secretion cell/ mm 2 in epidermis is about 2-4. O. onites has the smallest
epidermis cells. Although O. syriacum subsp. bevanii is including the most intense stomata
cell in the lower epidermis, the number of the stomata on the upper surface is really low,
moreover, it has been found out that there has been no stomata in some samples. This taxon
has the smallest stomata and the stomata index has been calculated as 45 for both of the
surfaces.
Keywords: Origanum, Oregano, Sect. Majorana, Micromorphology
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