This nice little barrel cactus (species unknown) has almost a complete ring of flowers around its crown. Each station where a flower bud appears can be traced back to the crown of the cactus by following the smooth curves that connect the fuzzy peaks along the top. Click on the image to enlarge.
Bob posted some information about mathematical formations in nature along with a photo of this very cactus without flowers a couple of years ago. Just like in the image above, the post showed examples of Fibonacci spirals, both natural and man made.
I can tell you that it’s a Mammillaria, or Pincushion Cactus, but the species escapes me at this time. I can see the Fibonacci spirals, though.
Pincushion sounds about right Thanks Crotalus!