Pollen morphology of 23 species belonging to Geranium have been studied in details, which represent eight sections of two subgenera i.e., G. sect. Dissecta, Geranium, and Tuberosa of subgen. Geranium, Divaricata, Lucida, Ruberta and Trilopha of subgen. Robertium. These plant species were collected from different phytogeographical regions of Iran. The palynological investigation was done using scanning electron microscopy (SEM) techniques. Different palyno-morphological features have been observed, and the closely related species were distinguished. We used different multivariate statistical methods to reveal the species relationships. Ward clustering analyses have been done to check out the relationship among the species. The shapes of pollen grains were monad, radially symmetric, isopolar, apertures were tricolporate, and of spheroid, prolate-spheroid or sub-prolate classes. Three pollen types were recognized on the basis of differences in exine sculpturing pattern: reticulate-clavate, striate-rugulate, reticulum cristatum with clavae. Observed differences were not of diagnostic importance in subgenera and sections level. The main objective of this study is to find distinguish pollen characters in the species of the genus Geranium and to elucidate their systematics importance.

Methanolic leaf extracts of two medicinal plant species of family Mimosaceae: Albizia lebbek L. and Mimosa himalayana Gamble, were used to evaluate their antibacterial and antifungal activity using agar diffusion method. Extractions from leaves of selected plants were carried out by simple maceration process. The methanolic extracts of these plants were tested against four strains of bacteria (one strain was gram positive that is, Bacillus subtilis and three were gram negative that is, Ecscherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae) and two strains of fungi (Aspergillus niger and Aspergillus flavus). At 15 mg/ml extract concentration, the maximum inhibitory zones observed in A. lebbek L. and M. himalayana Gamble were12.5 and 27 mm, respectively. A. lebbek L. and M. himalayana gave response against A. niger by producing 36.2 and 0.86% inhibition, respectively. No antifungal activity was reported by A. lebbeck L. and M. himalayana Gamble against A. flavus. Key words: Mimosaceae, antibacterial, antifungal, methanol extracts, medicinal plants.