Seyyedeh Bahereh Djavadi - Botany Department, Iranian Plant Protection Research Institute. P.O. Box ۱۴۵۴,Tehran ۱۹۳۹۵, Iran
Farideh Attar - Central Herbarium of Tehran University, Department of Biology, Tehran University, Tehran, Iran.
Ziba Najafi - Central Herbarium of Tehran University, Department of Biology, Tehran University, Tehran, Iran.

Cousinia azerbaidjanica (sect. Cousinia) from Azerbaidjan province is described as a new species to science and illustrated. Morphological differences between this species and its closest relatives C. tabrisiana and C. orientalis are also discussed.

Cousinia azerbaidjanica, Cousinia section Cousinia, Asteraceae, Azerbaidjan, Iran