Some kind of Bidens perhaps. Do the individual seeds have two pointed teeth at one end?

Have a look at Bidens species. Perhaps B. frondosa

https://www.minnesotawildflowers.info/flower/devils-beggarticks

You folks are the best! This does look like some sort of Biden, which I have never heard of before. I will keep an eye out for it elsewhere...I assume this is a volunteer not likely something a previous owner deliberately planted?

I will have to check the seed heads when I go back as I am not sure the answer to atlamol's question about teeth on the seeds.

Bidens is the singular if you are researching the plant.

Thank you, sorry, I guess I just mixed it up with the Vice President. ;)

How do you water your plants? An ordinary hose or one that does not contain toxic elements?

As for me, I only use non-toxic hoses, because I grow vegetables and fruits, but for watering ordinary trees, you can also use ordinary hoses.After all, plants are very sensitive to energy, attitude to them, and especially to chemistry. And all this is even more important if we are talking about fruit-bearing plants or vegetables. If mouthwash kills bacteria in the mouth, then do you really think that it will not kill something important for plants? I am a vegan and I respect my plants so much that I even water them only with my food grade garden hose. It is especially important that the plants receive only healthy and clean water. And ordinary hoses are made using harmful chemicals, which can damage both you and plants.

Just a query.

What toxic elements do hoses contain?

Second query....

Why would a 5 year old plant ID thread prompt a question on watering and hose toxicity????

Which is not a concern I would ever worry about.

Hoses are mainly not created for watering food products. Toxic can be not the hoses themselves, but the rubber from which it is made, in addition, over time, the rubber rots and therefore it is not necessary to water the plants from such hoses. It's strange that you don't know such banal things