I only found one small community of these plants, growing along the Potomac Heritage Trail, upstream from Roosevelt Island, just downstream from the confluence with Spout Run. This is a very narrow strip of moist fertile bottomland sandwiched between the Potomac river and the pavement of George Washington Parkway. The area along this trail is unfortunately increasingly affected both by invasive vines such as Porcelain Berry (Ampelopsis brevipedunculata) and inept attempts by humans to combat their spread. Nonetheless, there are still incredible pockets of biodiversity.