Susan, I love Purple Maze. Saw it in John Rice's Greenhouse the year he had a ton of David and Mort's things in there. Paid big money for it. I think it was the year it came out, or the following spring, so was pretty expensive. I think it was $150 or $200. One of the only ones I have ever paid that much for. A friend was with me... she bought Fabulous Freida the same time, and we planned to swap fans in a couple years. PM grew, but never increased well, so I gave my piece to my friend, because she is still hybridizing. FF should bloom this year for me, and I am excited to see it again.
I think Purple Maze, like Julie Newmar go way back to Paper Butterfly. They both have the petals that curl up in the throat like PB.
Here is a closeup of PM's throat.
