The Yellow sweet clover (Melilotus officinalis) belongs to Fabaceae (the Pea family). It is a biennial herb that is native to the Eurasian continent, and introduced in North America, Africa and Australia. This herb grows in sunny prairies, abandoned fields and roadsides, and it can reach 1.2-1.8 m in height. The leaves are trifoliate, hairless and arranged in alternate. The yellow flowers bloom at the spike-like racemes in spring amd summer. The foliage contains coumarin and has been used for flavoring cheese.