About 113 scientific names of species in the family.
Native to Argentina and Bolivia in their hills and mountains. The shape of the plants generally small, colorful cacti, globular or flattened – globular plants that usually form in a small clump. Stems are usually tubercular in poorly – defined ribs. Splines vary widely even within plants of the same species. They are vigorous growers which flower quite readily with typically a large number of relatively large, showy, brightly colored flowers which arise from aureoles usually around the lower portions of the stems. Flowers are funnel-shaped with floral tubes that often extend and curve upwards over the plant. Floral tubes feature scales and may have hairs but not spines. The color they form varies from red, white, pink, orange, yellow and two-tone color as well.