They dont look native probably exotic species. What are they? Height is probably 1.5 feet.
Lake is this
As Always confused already suggested, the second picture is Xanthium strumarium.
This is a very variable species, and there is a lot of debate around splitting this species into (sub)species. There is a possibility this is plant belongs to one of the few accepted species that wikipedia lists, some even native to Eastern Asia. However, I can't verify this because pictures of these are scarce.
But from my personal field expierence, this plant looks exactly like the X. strumarium and the habitat also matches, so I am comfortable to call this X. strumarium.
As to your first plant: - It will be hard to say without a close-up of the flowers/seeds. - It would be better to ask only one plant per question, so please remove it here and ask a new question.