Sulcorebutia
Sulcorebutia are a genus of cacti that are predominately from the mountain areas of Bolivia. This genus has recently been amalgamated with Rebutia. Consequently they can be found trading under both names.
These small cacti do not have obvious ribs and is, instead, organized in small tubercles. The spine wrap back against the body lending to a very attractive spination. Flowers can come in the second year and arrive in the spring and can be magenta red, purple, pink, or orange. Given time these cacti can create small clumps of numerous offsets. These cacti are what are known as window sill cacti and can live out their entire life on a sunny window sill. These are a great cacti for an one with limited speace