Rose of Sharon, 1930's, Bubble Gum pink is a good possibility for the blossoms. In Barbara Brackman's book, Encylopedia of Applique, there are many variations of Rose of Sharon, but after carefully going through her sketches of each design I didn't find one that looked like this. It is possible the maker used her own creative juices in breaking the traditional pattern apart. Many times a quiltmaker would put her own twist on the name of the pattern. To quote Barbara, "Symmetries moved away from the formal, four way mirror image or the bouquet of three blooms. Flowers undulated across the block echoing art nouveau naturalism. Blocks often featured a single flower rather than a symmetrical bouquet." Her comments were made following her research into the 1920's change in trends.