Generally small, colorful cacti, globular in form, which freely produce flowers that are relatively large in relation to the body. They have no distinctive ribs, but do have regularly arranged small tubercles. Relatively easy to grow.

Dense pectinate spines, magnificent, slow growing, orange flowers

White spined form, small growing

Dark red flowers, very short spines, small growing
Orange flowers, softish spines
Clumping form with dark green body, short white spines and red flowers, occasionally yellow or orange
White spines, deep orange flowers
Clumping form, yellow flowers