USDA NRCS, 2002. Plant Fact Sheet, USDA NRCS Plant Materials Program Document reference USDA NRCS, 2002. Burclover, Medicago polymorpha L.. Plant Fact Sheet, USDA NRCS Plant Materials ProgramWeb http://plants.usda.gov/factsheet/pdf/fs_mepo3.pdfCitation key USDA NRCS, 2002Datasheets Bur clover (Medicago polymorpha)
