This one is a hybrid by the German breeder Heise. It came from a whole series named after German cities. All of those were involving Trichocereus thelegonoides and were famous for their huge flower diameter. The body of MAINZ is extremely beautiful with lovely red spines too.
Category: Trichocereus Clones I-N
This Trichocereus hybrid is among the most beautiful that I personally k know. The flowers are huge and get to 18-20 cm in diameter. I do not know the breeder of Trichocereus ‘KA1’, but it could be Uwe Kahle. More info will follow.