a perennial plant (Diphylleia cymosa) of the barberry family, native to the S Appalachians and having one or two lobed, peltate leaves and a cyme of white flowers
See umbrella leaf in American Heritage Dictionary 4
noun
A perennial herb (Diphylleia cymosa) of the southeast United States, having a broad, peltate basal leaf, a terminal cluster of white flowers, and small blue berries.