As usual when the cacti are in bloom there is a race to take photos when the blooms are in shade and before they close up shop. This one nearly didn't happen. I was finished photographing so I barely aimed the iPhone and was blown away hours later when I discovered that the flower was perfectly positioned against a stone. Hipstamatic > Pic Grunger.
Photographed against the Agave is about all I know about this image.other blog. )