vintage hand painted glass tumblers, dogwood flowers juice glasses, Blue Ridge?

1940s or 50s vintage hand painted dogwoods drinking glasses set. It's a set of four little glasses about 3 5/8" tall. They hold 4 ounces comfortably.

These are signed by the artist (Sylvia?) and are all in very good condition. They look like Blue Ridge go-alongs to me, but might be Gay Fad?