I went back on my notes on my seedling of uncertain heritage. There are several possibilities for the ancestry, but the most likely pairing has 'Shimmering Elegance' as one parent. 'Shimmering Elegance' is fragrant, but I booted it from the garden because the flowers did not open as well as I would like, and the foliage was prone to leaf streak.
mystery seedling; fragrant
I have mixed feelings about this seedling, but thus far I have kept it; partly because it blooms M when the earlier daylilies are winding down, partly because the blooms are fragrant, partly because of the color (which is somewhat variable depending on the weather - and the picture looks clearer than I recall the bloom actually being). It has a lot of faults, though; it doesn't open as well as I would like, it is somewhat top branched, and the substance is thin towards the tepal edges.
It does suggest, however, that you can hybridize your own fragrant seedlings; you just need to have a care in choosing a fragrant parent with good plant traits, or else carefully select the non-fragrant parent to correct or compensate for the faults of the fragrant one.