Flower/Plant ID Please

I am having a tough time identifying this flower/plant...it came up in yard and I allowed it to grow instead of mowing it down...its about 3-4 weeks old and it had just started producing flowers. Flower come out of the main stem instead of off the branches of the plant.





This is year two for these plants...they came up a month or so ago...they do not produce a flower or a fruit and its not a cottonwood tree or elephant ear (They die in the fall)

 

My dad mentioned that and I looked it up and didnt think that was it?

 

By George I think yall are all right! I looked at a few pics of them and finally found a match...

http://www.wuvie.net/hollyhocks.htm

 

Now what about the last picture? What in tarnation is that thing?