Two new species of the genus Allium (Alliaceae) from Iran

Allium autumniflorum F.O. Khass. & Akhani and A. tuchalense F.O. Khass. & Noroozi are described as new species from Iran. The first species was collected in rocky habitat from N.E. Iran near Maraveh Tappeh (Golestan Province). The affinity of the species is not clear and because of extending of leaf sheath to the umbel, probably belongs to sect. Longivaginata. The second species was collected from alpine and subnival meadows of the Tuchal mountains in N. Tehran. It belongs to subgen. Allium, sect. Pallasia (Tzag.) F.O. Khass., R.M. Fritsch et N. Friesen. The habitat and phytogeographical importance of both species are discussed with their living images and distribution map.