Thimbleweed

Thimbleweed is the common name of any of several plants with seed heads resembling a thimble.

Species called thimbleweed include:
 * Rudbeckia laciniata
 * Anemone cylindrica
 * Anemone hupehensis
 * Anemone nemorosa
 * Anemone virginiana

Thimbleweed may also refer to:
 * Thimbleweed Park, a 2017 video game by Ron Gilbert and Gary Winnick