Angeline is correct - the pattern is "Pinwheel Paradise" by Laura Coons.
A downloadable PDF pattern is available here:
http://store.marthapullen.com/pinwhe...e-quilt-pattrn
The pattern is also in the book
Jelly Roll Dreams by Pat & Nicky Lintott. Several sources are listed here:
http://www.allbookstores.com/book/compare/1446300404