Rosa palustris

I was out competing with probably a hundred bumblebees this morning, trying to do some crosses on my single 7 ft tall plant of the native swamp rose (Rosa palustris). The combined buzzing of all those bees was amazingly loud. One I'm most hopeful to see offspring from, would be from some frozen Rosa xanthina pollen. I also did a few blooms with 'Old Blush' pollen (only had one flower because the plant is new and small), and a dozen or so with pollen of 'Winner's Circle'. Here are some blooms of Rosa palustris and one of those little bumblebees for scale.