Spectacularly beautiful cacti with dense multicolor spination, from Southern USA and Mexico.

Stenocactus is a genus of northern and central Mexican cacti of around 10 species related to Ferocactus.

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Echinopsis has recently been split, some have moved to Soehrensia, Lobivia, or Chamaecereus.

Ferocactus are fierce cacti from Mexico and Southern USA. Leuchtenbergia consists of a single species, from Mexico.

An easy to grow cactus from Argentina, Southeastern Bolivia, Western Paraguay, Uruguay, and the Southernmost part of Brazil.

Four genera that are all now Eriosyce, from Chile and Peru.