A new species and a new record of Poaceae family from Iran

The tribes Milieae and Phalarideae of the family Poaceae were studied to prepare Flora of Iran. Several living collections and herbarium specimens were examined. Among the plants studied, a new species belonged to Milieae was named and described as Milium atropatanum. In addition, from the tribe Phalarideae, Phalaris aquatica is recorded as a new report to the flora of Iran. The two species are illustrated and their taxonomic characters, differences with their relatives are given.