Austrocylindropuntia subulata.

Based on the frequent branching and little nubs on the stems I think it is a monstrose form, too.

I know the picture shows a lively plant, but it has, IMO, too many branches and the growth is somewhat spindly (indicating too much growth in sub-optimum conditions). At any rate, I'd not use it for grafting - too much trouble, WRT spines and glochids. It depends on what scions you intend to graft, but Harrisia jusbertii is the common go-to stock for many grafted cactus.

My plan was to take a cutting to use for the root stock so that it could grow better in more light. I want a root stock that provides the best growth and is easy to find. I've read that Pereskiopsis is a good one and am hoping to find on locally but, might have to order it online. That plant in the picture hasn't been getting the best light but unfortunately that's probably the best spot it's going to get. I will look into the Harrisia Jusbertii too. thanks for the help guys.

Cactus McHarris when you mention Glochids, are you referring to the amount of thorns you will have to work around on the cut area?

Glochids are tiny spines on the areoles that detach and stick in your skin if you touch them in the slightest way. Pereskiopsis, often recommended for grafting small cacti like seedlings, has those tiny spines, too.

Could you use Hylocereus as a potential root stock for grafting? I bought one and then thought of asking, so now I'm stuck with one either way. From the sounds of it I shouldn't use the plant pictured in the original post because there are better options. I went to Home Depot and bought an already grafted cactus, the one with the red ball looking thing on top and I am going to cut it off and use the existing stock to add my own scion to. I would like to find a Pereskiopsis because I plan to start some cacti from seed and would like to have them grow faster than they are known for.

Hylocereus trigonus and H. undatus are often used for grafting. Here is a small table showing what rootstocks are used for grafting various plants:

That's an interesting table, Rina - thanks! Nothing mentioned about cryptic cacti, though (Epithelantha, Ariocarpus, Blossfeldia, Yavia, etc). Was there possibly another page?

Thanks a lot Rina, are there more charts like that that you know of? I'd like to look at as many of those as possible. Thanks again.

Also, would an African Milk tree cactus make a good rootstock?

No - while there are many cactoid Euphorbias (AMT is a generic term for them), and they're good for use in grafting rare/touchy/slow Euphorbias, they're not useful for grafting cactus.

I'd suggest you, if you're able to, check out a book from the library on general cactus and succulent culture - usually there's a section on grafting.

Jeff

I do not have any, and can't remember where I got it ...but think I would have saved if there was any more than this.

Yonatin

Try THIS SITE .

rina.

That's a great site. Almost too much data, and I'm not overly fond of their arrangement of it all, but I saved it in my 'Forever' links.

Thanks guys for the help, I will look into some book to read and return if I have more questions.

I wonder if your cactus is a tree cholla of some kind.