Review the status of the Trigonella L. species (section Bucerates Boiss.) In Iran

Trigonella L. is one of the crop and grassland genera in Fabaceae family, with genera that have trifoliate leaves.Sect. Bucerates is the largest section consist of 10 species in Iran. According to similarities observed in the morphological corolla in this section with the genus Medicago, so phenetic study 12 species of Trigonella, 6 species Medicago, 1 Melilotus, and one species of Trifolium, were performed. Numerical taxonomy using 60 morphological characters of 20 species werementioned. A Cluster analysis based on Average Linkage method determined two main groups. Melilotus officinalis and Trifolium scabrum were Placed in separated group from other species.Sect. Bucerates placed in separated group from Trigonella and close to Medicago based morphological traits of corolla and Tripping mechanism, were likely transferred to Medicago strengthens. Pubescent calyx and Areoles are important traits in separating T. geminiflora from T. monantha, that previously mentioned as sub species.