- Plant: Arizona Barrel Cactus (Ferocactus wislizeni)
- Uploaded by SongofJoy
- Info: Closeup of buds, sepals and receptacles / 2002-08-04 / License: Creative Commons (cc-by-sa-nc-3.0) (Attribution, ShareAlike, NonCommercial)
- Caption: Steven J. Baskauf http://bioimages.vanderbilt.edu/