I am pretty sure it is goldenrod, but small and late, and of an atypical shape. The large blooms of the Canada goldenrod have turned brown by now. I went to pick just the flower on the walk back from the mailbox; I was surprised when the root ran along the ground just under the surface and perpendicular to the shaft of the plant. When I looked at it, I thought it was pretty and brought the whole thing home. It took some "persuading" to get it to hold another angle so I could scan it. I like the look of the cluster of root hairs where the plant goes underground.