Crested Saguaro

Carnegia gigantea (Englem.) Brit & Rose forma cristata, better known as a crested saguaro is a rarity, occurring only once in every 250,000 saguaro. http://www.nps.gov/sagu/learn/nature/why_crested.htm The cause of the mutation is not definitively known, with some biologists professing¬†it is the result of a genetic mutation and others believing¬†it is the result of either a lightning […]