Medicago hirsuta subsp.

Ponert Medicago hirsuta subsp.

ononidea Ruoy Medicago mollissima Roth Medicago ononidea (Ruoy) A. W. Hill Medicago polymorpha var.

It is native to the Mediterranean basin but is found worldwide.

[1] It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti,[citation needed] which is capable of nitrogen fixation.