There is a strange, ancient cacti called Pereskiopsis (not Pereskia though they look quite similar) which is a fast growing single stem tropical type plant with 4" lancolate leaves. Grafting onto this is said to be the fastest way to go from seedling to flowering adult in even the slowest growing cacti (ariocarpus, astrophytum, etc) in about a year as Pereskiopsis needs to be treated like a tropical houseplant not a cactus, lots of water, warmth and food.
On the cacti forum people said they didn't like Pereskiopsis grafts because it sometimes had a habit of causing the plants to become a clump instead of one big single head. I rather like the various sized clump look with the "matron" in the middle and all the pups around it. But each "offset" or whatever could be snapped off and made to root as a separate plant couldn't it if someone liked the single head look? To me, Pereskiopsis seems like a dream plant that might let me have some real neat, large plants quickly.
I was wondering if any of you have used this for grafting and if so what are your experiences with using it? After it outgrew the Pereskiopsis stem did you regraft to a Trichocereus stock or something to grow even larger or simply root it? I have 4 Pereskiopsis cuttings on the way to play with and will still have 4 once I do my first grafts! lol!
I've even seen some pics where people did a number of grafts up the stem instead of as a terminal graft to get the most of their growing space... Wild!