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 […]

Rillito River Walk

Spring is almost here and the weather in Tucson is delightful. Last evening my friend George and I took advantage of the perfect temperature and road our mountain bikes from her house to the bicycling/walking paths which flank the usually dry-as-a-bone Rillito  River. We’ve had an unusually wet winter; however, so the river is still flowing. Lots of people […]