perhaps the non-native S. arvensis
this one was huge - about 7 feet tall
what an odd plant - 3 different leaf shapes on one specimen
i heard this woodpecker do his kak-kak-kak-kak call and heard his booming drumming on dead pine trees. Had a good look at the crest when he flew by, but only got this so-so image. You can see the big white linings in the wings.
In freshwater ditch
Naturalized in local ditch
On red elderberry, Sambucus racemosa
Milky sap; I've never seen this plant flower, but it is the only one of its kind that I've seen in my neighborhood