I see these in the woods in early spring here in Wisconsin and I love them but I never knew this charming folkname! I have only known them as bellwort.
Uvularia is a genus of plants in the family Uvulariaceae, sister to the lily family (Liliaceae). They are commonly called Bellworts, Bellfowers or Merrybells. This unusual flower is found in April and May, often on wooded slopes or in ravines and it spreads by stolons or stoloniferus rhizomes. The plants are usually 18 to 24 inches (45–60 cm) in height and bear one or two flowers which hang downward from the axils of the leaves.