We were able to get a few seedlings of Phrag. Eric Young made with Phrag. besseae fma flavum , but none of them were pure yellow in color. Each had varying degrees of a pink wash in the petal tips and pouch. ?Here's a photo of one we kept for future breeding. It's the 'Yellow Bird' clone. Photo quality isn't the best, but the plant is once again in bud, so will try to get a better pic this time around.Go for it. Yes it has been done, Tom Kalina, I believe, they didn't come out album.