Habib Zare - Herbarium of Nowshahr Botanical Garden, Agricultural and Natural Resources Center of Mazandaran
Moslem Akbarinia - Faculty of Natural Resources and Marine Science, University of Tarbiat Modares, Tehran
Seyed Mohsen Hosseini - Faculty of Natural Resources and Marine Science, University of Tarbiat Modares, Tehran
Hamid Ejtehadi - Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad
Tayebeh Amini Eshkevari - Herbarium of Nowshahr Botanical Garden, Agricultural and Natural Resources Center of Mazandaran

Betula litwinowii Doluch., discovered from northern Iran, is reported as a new record for the flora of Iran. Morphological characteristics of this species are compared to its closest relative, Betula pendula Roth. In addition, the geographical distribution of these two taxa in Iran and adjacent regions is discussed.

Betula litwinowii, Betulaceae, new record, Iran