beckygardener said:
Are there any narrow leafed cultivars out there that are highly susceptible to rust? I would be interested to know.
In Asia many of the species daylilies are highly susceptible, I would think most of those are narrow-leaved - also the plant I believe to be Hemerocallis lilioasphodelus here is (I used selfed seedlings of it to keep rust going through winter indoors because they are very susceptible). The "ground zero" plant for daylily rust is 'Pardon Me' which would be narrow-leaved.
Here's a pic of an infected species daylily in Japan:
http://web.ncf.ca/ah748/longit...
Do you see a difference in leaf width between foliage habits or ploidy?