Eulychnia
Eulychnia is a genus of candelabriform or arborescent cacti. It includes nine species native to Peru and northern Chile. These desert cacti can survive under very hot conditions—temperatures can reach up to 50 degrees Celsius. Furthermore, this breed of cacti can also survive in some of the driest places in the world such as the Atacama Desert, the driest desert in the world.
Species
, Plants of the World Online accepted the following species:| Image | Scientific name | Distribution |
| Eulychnia acida Phil. | Chile. | |
| Eulychnia breviflora Phil. | northern Chile. | |
| Eulychnia castanea Phil. | Chile | |
| Eulychnia chorosensis P.Klaassen | Chile | |
| Eulychnia elata Lodé | Chile | |
| Eulychnia iquiquensis Britton & Rose | Chile. | |
| Eulychnia ritteri Cullmann | Peru | |
| Eulychnia taltalensis Hoxey | Chile | |
| Eulychnia vallenarensis P.C.Guerrero & Helmut Walter | Chile |