A pink Clematis flower on a garden cultivar of Clematis montana.
Clematis montana or the Anemone Clematis is an early flowering plant of the genus Clematis. It is a vigorous climbing plant and is used by gardeners to hide unsightly structures such as sheds and walls. It is native to mountain areas of Asia from Afghanistan to Taiwan.
Description adapted from Wikipedia: http://en.wikipedia.org/wiki/Clematis_montana