سیده باهره جوادی - Department of Botany, Iranian Research Institute of Plant Protection, P.O. Box ۱۴۵۴, Tehran ۱۹۳۹۵ E-mail: sb_djavadi@hotmail.com
مجید اسکندری - Department of Botany, Iranian Research Institute of Plant Protection, P.O. Box ۱۴۵۴, Tehran ۱۹۳۹۵
فریده عطار - Central Herbarium, Faculty of Science, Tehran University, Tehran, Iran

Cousinia papillosa (Asteraceae) from eastern Iran is described and illustrated as a new species. Differences between the new species and its closest relative, C. meshhedensis, are discussed. A map showing the distribution of the two species is given. The scanning electron micrography of the pollen grains shows obvious differences between the two species especially in the sculpturing of exine. The meiotic chromosome count is also reported (n=۱۳).

Cousinia, Asteraceae, palynological studies, chromosome studies, new species, Iran