Biosystematic study of four species of Crataegus L. in central of Iran

Crataegus L. belongs to Rosaceae family. During the review on the different species of this genus is cleared the C. ambigua is mentioned in Flora Iranica and Flora of Iran as synonymous of C. meyeri while monograph of this genus is reported this species for Iran, and so C. atrosanguinea and C. aminii is mentioned in Flora of Iran. C.aminii is very similar to C. atrosanguinea. Monogragh announced C. atrosanguine is synonymous with C. ambigua ssp. ambigua and is not reported C. amini for Iran. In this survey due to contraction and taxonomy clarify of these four species using morphology and micromorphology characters had been done. Results showed C. aminii is the same of C. atrosanguinea and the other hand C. atrosanguinea is synonymous with C. ambigua ssp.ambigua. In the end two species of C. meyeri and C. ambigua according Chriastensen are distinc.