Upright annual or biennial that grows 1.5 – 7 feet tall. Has serrated leaflet edges with three leaflets per leaf. Has white or yellow flowers and as extensive taproot. The white-flowered sweetclover (M. alba) is talker, coarser-stemmed, and has coarser leaves than the yellow-flowered type (M. officinalis). Yellow sweetclover is more drought tolerant, more vigorous as a seedling, flowers earlier, and has spreading growth.
Eric Lee-Mader, Anne Stine, Jarrod Fowler, Jennifer Hopwood and Mace Vaughanby – Xerces Society for Invertebrate Conservation with contributions from the USDA Natural Resources Conservation Service August 2017 Cover Cropping for Pollinators… Show more