.This looks like a design from a favorite coloring book of mine, "Dreamscapes" by Maryam Addato, Dover Publications. Now also available as a "Creative Haven" coloring book. Mostly the same designs, though not all from the first edition made it into the CR version.
Colouring Craze for Adults : Grown Up Colouring Books (with Giveaway
Pop Art Adult Coloring Book. An adult coloring book like none other! Kids all over the world love Jenny Knappenberger’s Pop Art interactive coloring pages for children and now she has created them for adults to enjoy as well. Get coloring!