Mine were sold to me as H. lilioasphodelus but the worry is the flower is more golden than light yellow. Basically, what are the actual species of Hemerocallis is a bit messy. I have seen an Asian guide somewhere that listed lilioasphodelus as lemon yellow to orange yellow.
Alas, humans have been involved in breeding daylilies for a very long time and comprehending the phenetics and genetics of true species is probably too difficult now with some species-groups.
Mine dies back in winter. It is usually my first daylily to open for the flowering season in August (end of winter - I am Southern Hemisphere). It reblooms throughout the season. The funnel-shaped flowers open in the afternoon and stay open overnight and into the next day. It is diploid, pod and pollen fertile.
It is quite fragrant but, needless to say, it is a rust bucket.
