I’m having second thoughts as to TTC testing on Pholisma sonorae; it’s been >20 years since I ran TTC tests on this weirdo, and I’m doubtful as to the results way back when.

The seeds are small, maybe 1-2mm, and they are biconcave, like a red blood cell. They imbibe upon introduction of water, and the embryo plumps up nicely. With a bit of work, the testa can be removed, revealing the embryos, with or without coloration.

TTC, being what it is, “likes” to turn pink no matter what, so I’m having problems figuring out whether I’m getting true color changes with such an oddball.

Anyone with experience doing seed testing on such weird seeds, I’d be interested in your observations. I’ve never found TTC all that useful with orchid seeds, and that’s 99% of what I’ve worked with, so I’m skeptical as to its value with pholisma.