What a find!!
I believe this pattern is called "Dresden Plate" I bought a book at JoAnnes titled "Grandma's Quilting Bee" and has this very same pattern. It has all the directions ot make it. since you have these lovely pieces, you have a head start. This pattern is also known as "Friendship Ring" and "Grandmothers Sun Bonnet" If you can't find it I would be happy to copy it and send to you.
Phyllis