Austrocactus

Austrocactus is a genus of cacti with ten species endemic of southern South America, in Argentina and Chile.

They have solitary or branched bodies, the ribs are usually divided into tubercules (except Austrocactus spiniflorus). The tallest species in this genus is 80 centimeters. Flowers are pink, orange, red or yellow with a characteristic spiny tube.

Species
Ribs divided into tubercles:
 * stems upright
 * large stems (>25 cm)
 * Austrocactus bertinii
 * Austrocactus dusenii – synonym of Austrocactus bertinii
 * Austrocactus intertextus sensu Speg.
 * Austrocactus patagonicus – synonym of Austrocactus bertinii
 * smaller stems (<25 cm)
 * Austrocactus ferrarii
 * Austrocactus longicarpus
 * Austrocactus philippii
 * stems prostrate
 * stems with adventitious roots
 * Austrocactus colloncurensis
 * Austrocactus coxii
 * Austrocactus gracilis – synonym of Austrocactus coxii
 * Austrocactus hibernus
 * stems without adventitious roots
 * Austrocactus subandinus

Ribs smooth:
 * Austrocactus spiniflorus