Three cactus genera from the Southern USA and Northern Mexico.
Small to medium cacti from USA and Mexico, often with brilliant flowers.
Eriosyce from Chile and Peru.
Mammillaria is one of the larger genera in the Cactus family, and one of the most variable.
The three most common types of mutation are crests, monstrose growth and variegation. All of these are mutations of the cellular structure.
A genus of cacti from the dry coastal deserts, particularly the Atacama Desert, of northern Chile.
Astrophytum (Bishop's Hat) is a (mostly) star shaped cactus from north/central Mexico and southern Texas, USA.
Ariocarpus is one of the treasures of the world of Cacti, from Central to Northern Mexico and Southern Texas.
One of the larger genera in the Cactus family, and one of the most variable.