Mini-Show Cactus November 2017: Crest and Monstrose
The three most common types of mutation are crests, monstrose growth and variegation. All of these are mutations of the cellular structure.
Mini-Show Succulent October 2017: Lithops, Conophytum
Sometimes called "Living Stones".
Mini-Show Cactus May 2017: Mammillaria (clumping)
One of the larger genera in the Cactus family, and one of the most variable.