Here's one of my bikes that's similar to the one you're talking about.
Joking aside, I have a neighbour who has a bike rusting in her backyard that sounds just like your description. She's got an old Murray and an old Huffy version of the old Schwinn Stingray(my custom pictured above) and one of them has the same flower graphics. I'll see if I can get any pics of it or anything.
Good find.