Swamp Rose (rosa palustris) - 2008-7-4 Cornell Laboratory of Ornithology - Finger Lakes of New York

two bees fighting
5 to 7 leaflets
leaf and two stipules:
http://www.ct-botanical-society.org/Plants/view/523
http://www.fs.fed.us/wildflowers/plant-of-the-week/rosa_palustris.shtml
http://uswildflowers.com/detail.php?SName=Rosa%20palustris