THE RECORD OF PETASITES ALBUS (ASTERACEAE) IN IRAN

گونه Petasites albus (L.) Gaertner به عنوان گزارش جديدي از جنگلهاي شمال ايران نام برده مي‌شود. اين گونه از Petasites hybridus (L.) P. Gaertner به علت داشتن كرك‌هاي دايمي تار عنكبوتي در زير برگها و گل‌آذيني بلند و كشيده و گل‌هاي سفيد رنگ با برگه‌هاي گريبانه‌اي غده‌دار متفاوت است.

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.