Great idea Liz!
Here's another site that lists which peonies have fragrance, and I also like that they list who originated the plant and when, along with nice pictures. The site provides some nice info:
biological description (e.g. whether it is a hybrid or a Paeonia lactifolia cultivar)
who originated the cultivar and when (e.g. Roger F. Anderson, 1986)
flower form (e.g. single, double, semi-double, and so forth)
colour
flowering season (e.g. early, midseason, or late, with respect to peony blooming time)
height
if it is floriferous (i.e. has side buds)
if it is fragrant
http://www.theplantexpert.com/...
I reviewed the list from Swenson's, ( thanks LG for posting the link), and I have 27 plants from the list, with 14 of them being fragrant :hurray:.