Melilotus caerulea

from The Collaborative International Dictionary of English v.0.48
Melilot \Mel"i*lot\ (-l[o^]t), n. [F. m['e]lilot, L. melilotus,
   fr. Gr. ?, ?, a kind of clover containing honey; me`li honey
   + ? lotus.] (Bot.)
   Any species of {Melilotus}, a genus of leguminous herbs
   having a vanillalike odor; sweet clover; hart's clover. The
   blue melilot ({Melilotus caerulea}) is used in Switzerland to
   give color and flavor to sapsago cheese.
   [1913 Webster]
    

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