بررسی تهیه و نگارش فلور ایران تیره توس و جنس نمدار

Despite many studies about flora of Iran, many of Iranian plants are unknown; one of the important and valuable plants families is Betulaceae and genus Tilia. Herein family of Betulaceae and genus Tilia contained valuable woody elements in Iran. Therefore, many specimens were collect and their taxonomic and ecological characters were studied in the habitat, finally specimens were identified. Result of our study showed that in genus Betula, one species, Betula litwinowii was recorded and it is a new for the flora of Iran, and in genus Alnus , 2 species were new for the plants world : Alnus djavanshirii and Alnus dolichocarpa. Alnus orientalis was recorded for the flora of Iran too, concerning the genus Tilia in Iran, Tilia platyphyllos doesn't exist in Iran but instead 6 further species superimposed to genus Tilia in Iran, Tilia sabetii and Tilia stellato-pilosa are two new species for the plants world and T. cordata , T. cordifolia, T. dasystyla and T. rubra are new records for the flora of Iran and Tilia X euchlora, as a hybrid, was also introduced for the flora of Iran. Key words: Betulaceae, Betula, Alnus, Tilia, flora, Iran.