Did a little hiking this morning and I saw a crested saguaro - never seen one before, they're apparently pretty rare. From nps.gov: "'Cristate' or 'crested' saguaros form when the cells in the growing stem begin to divide outward, rather than in the circular pattern of a normal cactus. This is an unusual mutation which results in the growth of a large fan-shaped crest at the growing tip of a saguaro’s main stem or arms."

Anyway, it is cool looking.