There are many varieties of picta. Some well known ones, as well as new ones bred wild.
Some of them shall contain a good profile (as also e.g. a trip report on erowid suggests). I wanted to make an analysis of many different known pictas, so I ordered many varieties from a big distributor in France. But he never sent them...(fortunately I didn't pay in advance)
The big advantage of a picta is IMHO, that it doesn't produce viable seeds, so it is waaayyy easier to grow, as with the others you have to always stay on alert and not let any produce seeds, as this will contaminate your clones. I really underestimated this point, as I had to discover this year, how problematic this is. You basically can never be away for a longer time...
Also just from viewing my picta grow in relation to my normal arundinaceas, the picta grows more leafs, less stems, and spreads faster (this was actually a specific breeding goal of the pictas, for their usage as ornamental grass).
and not really worth pursuing when more reliable strains are readily available.
Well if any of the established picta clones would have a proper alkaloid profile, then that would definitely make the acquisition quite easier, as you could be 100% sure it is this specific clone, when ordering from your garden supply store. With the normal Arundinaceas it is problematic: If they seeded at any time, they are contaminated. And as also reports from this forum describe: It can happen, that the specific "Appleseed" clone you bought, isn't it anymore, as somewhere in the growing line someone had a mishap, and they seeded.
As I now had to look for my plants all the year, I can say that this is actually quite a task, IMHO. So I can well understand that it can happen easily at some point in time, that a grass seeded. The big advantage of the pictas is, that they are infertile, and so this cannot happen.