An article snippet about my home state, South Dakota:

""The following lists are made with no attempt at classification so
far as botanical relationships are concerned. They contain representatives
of many species which are of little importance to the ma_jority of
readers of the Rose Annual.
"In the hardiest group which have not winter-killed are the following
: Rosa rubrifolia, Hansa, Persian Yellow, Tetonkaha, Belle Poitevine,
R. rugosa, R. rugof';a alba, Betty Bland and probably Roseraie de
l'Hay and R. laxa.
"In the second hardiest group, which while they kill down considerably,
yet practically always give good bloom, are : Sir Thomas. Lipton,
F. J. Grootendorst, Universal Favorite, Illinois, R. hugonis, Amelie
Gravereaux, Conrad Ferdinand Meyer, and probably Sarah Van Fleet
and Dr. E. M. Mills."

http://openprairie.sdstate.edu/cgi/viewcontent.cgi?article=1239&context=agexperimentsta_bulletins

Dr. E. M. Mills is approaching his first anniversary in my "garden". He produced thirteen blooms on the small plant this spring, then sat for MANY weeks, appearing not to be doing much other than possibly forming a root system. He suddenly began exploding into much growth. There are many new "laterals" along the older wood with two basal shoots exceeding two and a half feet in length. Yes, he is chlorotic, which is to be expected with the high heat and continual watering, even with feeding. I just noticed there is a flower bud on a new lateral from some of the original growth! I've not discovered anything about whether or not "repeat" bloom should be expected. Now, it has me wondering (and hoping!). Three photos to illustrate this comment are posted in the "Photos" section on this date.