Polymerous said:
One of my (older, unbloomed) seedlings has sketchy looking foliage, but as a part of that, there are some spotty (paler foliage) areas with a dark green center. Someone refresh my memory, because my brain is trying to tell me that indicates rust resistance... That can't possibly be right, can it? 
When the leaf is dying the areas around the pustules can stay green, is that what you're seeing, as in the "green islands" pictures (scroll down the page in the link):
http://web.ncf.ca/ah748/FAQ.ht...
I think there is some debate about what causes this, one theory is that the fungus is able to keep the area it is feeding from inside the leaf alive so as to survive longer. I forget what the alternate theory was now but I'm pretty sure it wasn't resistance.
Where you see brown areas around a pustule instead of green, that is believed to be an indication of resistance, maybe that's what you're thinking of? Some daylilies, like 'Chicago Apache' in my tests (and I think others) just gets brown spots without even any pustules erupting in the middle. Where you get minimal brown around the pustules then that would indicate more susceptibility.
