Elham Rezaei - Master of Science Student / Department of Biology, University of Isfahan, Isfahan, Iran
Hojjatollah Saeidi - Assistant Professor /Department of Biology, University of Isfahan, Isfahan, Iran
Mohammad Reza Rahiminejad - Professor / Department of Biology, University of Isfahan, Isfahan, Iran

In this research, the taxonomic status of the genus Cynosurus in Iran has been briefly reviewed. The results showed that two species Cynosurus echinatus L.and C. effusus Desf. are growing in Iran. A total of ۱۳ herbarium and new collected specimens belonging to this genus were analyzed using ۶۱ qualitative and quantitative morphological characters. A taxonomic key, descriptions and habitats of two species with images has been presented. Also, characteristics of the karyotype of C. echinatus is provided.

Cynosurus, Poaceae, Taxonomy, Chromosome, Karyotype, Iran