Habib Zare - herbarium of Nowshahr Botanical Garden, Agricultural and Natural Resources Center of Mazandaran. Nowshahr, Iran.
Tayebeh Amini - herbarium of Nowshahr Botanical Garden, Agricultural and Natural Resources Center of Mazandaran. Nowshahr, Iran.
Moslem Akbarinia - Faculty of Natural Resources and Marine Science, University of Tarbiat Modares, Tehran.

Petasites albus (L.) Gaertner as a new record is reported for the first time from Hyrcanian forest zone in north of Iran. The species is different from previously known species (Petasites hybridus (L.) P. Gaertner) due to having permanent and white-arachnoid indumentum on below the surface of leaves, longer inflorescence and white flowers with glandular hairs on the phyllaries.

Petasites, Hyrcanian forests, new record, Iran