Plant ID = Rough Cocklebur ( Xanthium strumarium). The seeds are toxic - Thanks to Fizgig=)
I caught this late on an October afternoon as the sun was getting ready to set. The plant was in bright sunlight and the stream backdrop was in fairly deep shade. It would have been even niceer if I could have gotten more of the plant into the frame but distractions would have destroyed the shot imho.
This goes to show that a good 300mm (450mm equivalent) lens is pretty hard to beat for bokeh