Help identify this plant

Hi,
I have a number of these plants growing in my greenhouse, I'm only a beginner so I don't have a clue what they are - hence this post. Is it a weed or a pepper (that's what I think should be there)?

Thanks in advance, Steve.

 

Golden henbane? Maybe not. When those flower buds in the center open it will be easier to tell.

 

Pic of the flower attached... any ideas?

 

Shoofly, Nicandra physalodes.

 

Mystery is over. I followed a couple of links and they look exactly like mine.

Thanks for your help, Steve.