Physocarpus opulifolius

Found on river banks, rocky outcrops, and valley bottoms. Check out the scree slopes at the end of the Taughannock gorge walk. Fall color varies. The leaves and bark are easy to identify. Horticultural interest has resulted in many cultivars, often with yellow or dark red leaves. Studies indicate that pollinators prefer the species flowers over those on dark-leaved cultivars, so use those sparingly if at all.