Gourd wrote: Zen-Man, yes, that's a great idea, I have to start doing that, I should have tried that with some of the plant in the first photo.
Butterfly: That is the PT glue. Good stuff. I agree, use the plywood, I don't think the tiles will pop off the plexiglass, but the grout might. You would have to sand the plexiglass to make it rough, then glue the stuff on.
The following photos are crosses that I have marked and seeds tagged.
All speckled flowers for now, I'll post more as I have time.