They dont look native probably exotic species. What are they? Height is probably 1.5 feet.
Lake is this
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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.