Next two pictures are of Rosa palustris X fedtschenkoana. Definitely hybrid, it's intermediate between the two species in almost all characters. It's about 3 feet tall now, but no signs of flowerbuds. So, I'm hoping that it's just going to be a late season bloomer like Rosa palustris - which is usually one of the last species to bloom here.
The last one is such a slow grower that I might be waiting a while for it to bloom. But I'm excited anyway. It's Rosa palustris X xanthina. The bloom timing is so different for these two species that I had to freeze pollen from Rosa xanthina for a month or two, to be able to get the cross. I'm curious what part of the season this one will decide to bloom in and what color it'll be. [Rosa palustris is pink, Rosa xanthina is yellow.