TBM clone A long form
long form TBM clone A, reverts available on occasion
This clone of TBM tends to grow long sections and has been grown in cactus collections for decades. First origin of this clone is unsure.
There are two forms of TBM that are most common - one produces short segments and the other produces long segments. At one point Sacred Succulents began referring to the long form as clone A and the short form as clone B. Sacred Succulents has also named a TBM clone C and TBM clone D. Clones C and D tend to have a melted wax type growth rather than the distinct segment growth of clones A and B.