About once a decade (no, I lie - the last was in 2005), our cactus flowers. Here it is again, only this time it has excelled itself and produced four (yes I know you can only see two in this pic). I also rather like the way you can see the flower structure merging into the leaf. There are more pix if you like. This is also a sentimental cactus: my grandparents used to own it, and more: it was a gift to them from my uncle Roland.
Raindrops on Opuntia cactus Tucson, Arizona photo details: Canon 100mm f2.8 macro lens on a Canon 20D. f/7, 1/100 sec, ISO 100 hand-held, natural light contrast boosted in PS
  The Saguaro might, one could fancy, be a tree designed by someone who had never seen a tree. -Donald Culross Peattie, 1950