This one has been in my greenhouse a quire while.
I bought seeds of Ariocarpus fissuratus f Big Bend and sowed on 31st October 2003.
I grafted several young seedlings on Hylocereus stocks.
I degrafted them in 2007 when the scions grew as large enough.
Since you can not cut the part of fissuratus body because it is hard to stop liquid running out from cutting face, a short vascular bandle of the stock was remained.
I assume the plant relies on own-roots at moment.
The daylight time has been shorter and Aiocarpus have caught the early autumn up, I think.