Tentatively IDed until it flowers again, or other characters can be used to determine if this is R. bifrons instead.
Visited this location after seeing a recent observation by @walkingstick2 that I suspected was not R. pensilvanicus. I did not see any other upright Rubus in the area between the street and the pond. R. trivialis present nearby.
Plants are about 4 feet tall, but some growing taller on nearby vegetation. Upright. Younger stems are full of leaves (mostly ternate) with recurved pickles. Lower stems are more densely covered in erect prickles. Last years stems are bare except for spent inflorescences. Not many inflorescences remained, but of the few I could find, none had more than 7 flowers. Located on the residential street side edge of a nature park with American Elms and a few red oak saplings.
