When looking through the 210 "Dandelion" images at Acclaim Images.com this Blue Goatsbeard Seedhead was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
Blue Goatsbeard Seedhead
A photo of a goatsbeard seedhead taken with the camera's white balance set on tungsten. These seedheads look very similiar to the dandelion but are much larger.

Some related terms for more images:
natural,  flower seed,  nature,  goatsbeard,  flower seeds,  dandelion,  texture,  flowers,  spines,  blue,  down,  sharon day,  seedhead,  dandelions,  background,