Trichocereus pachanoi monstrosa “Clone B”
Trichocereus pachanoi monstrosa “Clone B” is a mutant cultivar of Trichocereus pachanoi. There are two very common mutant cultivars of Trichocereus pachanoi. Sacred Succulents lists them as CLONE A and CLONE B. Please note that they are not the same as the two Trichocereus bridgesii Monstrosa cultivars that are also listed under that name.
Trichocereus pachanoi monstrosa “Clone B” forms clumps of coral or brain-like cristate growth. Often offsets monstrose branches that mutate in a variety of interesting ways. (Sacred Succulents).
Both Clone A and Clone B are very similar and I would not be surprised if they are actually different incarnations of the same clone. That said, there definitely are differences between the plants that I inspected.