Yellow flowers in August, 24" tall. Unfortunately the bugs have gotten to it, so the photos aren't great. I traded plants earlier in the summer with a neighbor. She is a skilled gardener, but doesn't bother with plant names! Anyone recognize this plant? It is perennial.
One of the perennial sunflowers, Helianthus species, never could tell them apart, possible H x. multiflorus. Mind if it is, then it ought to be over 6 feet tall.