دینا عزیزیان

[ 1 ] - POLLEN MORPHOLOGY OF SOME ADONIS L. SPECIES (RANUNCULACEAE) FROM IRAN

The pollen grains of four species of Adonis consist of A. wolgensis Stev., A. aestivalis L., A. dentata Del. and A. flammea Jacq. were studied using scanning electron microscopy (SEM). In this work 10 different pollen characters were described, illustrated and compared. All pollen grains were tricolpate and exin ornamentation in two types, as echinate in A. wolgensis with small grains (mean = 19.…

[ 2 ] - PETIOLE ANATOMY IN ASTRAGALUS SECT. INCANI DC. (FABACEAE) IN IRAN (A PHYLOGENETICAL APPROACH)

Cross sections of petioles in 24 species of Astragalus Sect. Incani has been studied for a comparison of anatomical characters based on phylogeny in this section. The characters which employed in this study are as follows: Numbers of parenchymatous cell layers in pith, number of bundles, length of ventral axis, length of dorsiventral axis, diameter of ventral latéral vascular bundle (VLB) and dia…

[ 3 ] - COMPARATIVE ANATOMICAL ANALYSIS OF STEM IN FOUR GENERA OF THE TRIBE SALSOLEAE, CHENOPODIACEAE

The stem anatomy of 18 species belong to the genera Anabasis L., Haloxylon Bge., Hammada Iljin, Seidlitzia Bge. ex Boiss. of the tribe Salsoleae (Chenopodiaceae) was examined. Anatomical characters with numerical analysis provided some significant data for the delimitation of taxa at the generic and specific levels.

[ 4 ] - BROMUS ARVENSIS (POACEAE), A NEW RECORD FOR THE FLORA OF IRAN

Bromus arvensis is reported for the first time from Iran. It has been collected from NW. Iran, Azarbaajan area. This species is compared with its relative B. brachytachys.

[ 5 ] - POLLEN MORPHOLOGY OF THE GENUS DIPLOTAENIA (APIACEAE) IN IRAN

The pollen morphology of two species belonging to the genus Diplotaenia Boiss. have been investigated by SEM and LM. The results confirm the stenopalynous character of the family Apiaceae. The palynological observations reveal that pollen grains of the genus Diplotaenia are prolate in shape and posses tri-colporate aperture with costae. The sculpturing of both species are rugulate. Therefore D. c…

[ 6 ] - MORPHOLOGY AND DISTRIBUTION OF TRICHOMES IN SOME GENERA (MORUS, FICUS, BROUSSONETIA AND MACLURA) OF MORACEAE

The micromorphology and distribution of trichomes in leaf surfaces of speciesbelonging to Morus, Ficus, Broussonetiaand Madura which are native or cultivated in Iran werestudied. Three types of trichomes including; glandular, nonglandular and cystolith trichomes showedcharacteristicfeatures in thesegenera of Moraceae. Glandular trichomes are usuallywith short stalk and spherical or elongatedhead.…

[ 7 ] - A TAXONOMIC REVISION OF THE GENUS MEDICAGO L. (FABACEAE) IN IRAN

Taxonomic aspects of the genusMedicagoL. in Iran werestudied. Among the 2500 herbariumsheets and dried fruit samples of 150 populations, 22 species and subspecieswereidentified. New subsectionAstrocalyxI. Mehregan (from the section SpirocarposSeringe in DC.) and new combination, M. rigidulasubsp. sinskiae(Uljanova) I. Mehregan&M. R. Rahiminejad are introduced. Also, twospecies and one subspecies …

[ 8 ] - POLLEN MORPHOLOGY AND TAXONOMY OF THE GENUS NEPETA SECT. PSILONEPETA (LABIATAE) IN IRAN

Based on the SEM studies. the pollen morphology of 8 species of the genus Nepeta L. Sect.Psilonepeta native to Iran is described and compared. Taxonomic value of pollen morphology is discussed. Differences in size and ornamentation of pollen and other conclusions from morpological and anatonical data, suggest that N. denudata should be transferred to Sect. Denudata supporting Budanstsev’s treatme…

[ 9 ] - CHROMOSOME COUNTS FOR FIVE SPECIES OF MORACEAE FROM IRAN

Chromosome counts are given for 5 species of Moraceae belonging to 2 genera (Morus and Ficus) from Iran. Chromosome numbers (2n) for F. johannis and F. rupestris are reported for the first time. The collections cover the entire range of family from Iran.

[ 10 ] - THE TAXONOMIC SIGNIFICANCE OF LEAF ANATOMY IN THE GENUS ONOSMA L. (BORAGINACEAE) IN IRAN

The leaf anatomy of representative species of Onosma L. from Iran have shown that the type of hairs are characteristic features in distingushing species and group of species within the genus. In internal structure of lamina two distinct groups are recognized within Onosma; sections Protonosma M. Pop. and Podonosma (Boiss.) Gruck with dorsiventral mesophyll and sect. Onosma mainly isobilateral. Se…

[ 11 ] - ANATOMICAL STUDIES OF MENTHA MOZAFFARIANII (LABIATAE) AND A RELATED SPECIES

The leaf and stem anatomy of Mentha mozffarianii was studied and compared with M. longifolia which differs from in it morphological characters. Although the two species have many anatomical characters common within the genus Mentha they differ in several aspects of leaf anatomy such as trichomes and stem characters.