I had a thread specifically on lily foliage back on DavesGarden. That makes at least two of us who admire the foliage.
While hybrids natural blend many characteristics, species tend to be quite distinct. Same with the underground bulbs, as you may remember from my species bulb thread:
The thread "Species Lily Bulbs" in
Lilies forum
Two pics of White Henryi from 2010 and 2011: