Cleistocactus strausii
Silver Torch cactus can thrive in low-nitrogen soil without facing the consequences of low nitrogen. Too much water will make the plant weak and lead to root rot. 
Least Concern. This cactus is locally abundant in its native land and has few local threats to its survival.
This cactus can be propagated by cuttings or seed.
Cactus cat
Cactus cats were social animals, often mating for life. They were said to live about 20 to 30 years. Before and during mating season, the male felines would break open a large Saguaro cactus and let the smell attract females to the location. Often enough, two females would be attracted to the scent, and fight. The fight usually ended in one of them getting brutally spiked or stabbed to death. The winning female would then meet with the male and drink the cactus juice. The pair would get drunk and then produce a litter of kittens within the next few weeks. The kittens were born blind at birth with no spikes.