Ok, now that I had gathered up my yellow martagon seedlings, I was ready for the next step of creating yellow martagon seedlings that were spotless and had relatively non-recurved flowers and also plants with a good stem of flowers on them.
I started off crossing some of the gathered yellow seedlings with a good white unspotted seedling with non-recurved flowers - see first photo below.
So this is some of what I've managed to get up to this point. I suppose I might be looking for even more of a non-recurved flower, but this is a good way toward achieving what I was looking for. I have yet to put any of these in my perennial borders as I am waiting for the clumps to bulk up first. You will notice that some are very light yellow and the occasianal seedling with flowers with yellow "faces" and white on the reverse which adds a bit of interest too. I suppose I like the yellows that are more of a lemon yellow i.e. with some green in the yellow. Oh, you may also notice in some of the photos of the seedlings, that some of the seedlings have flowers that start off as nearly pure white flowers, but age to a soft yellow quite quickly.
Jim