Wildflower Identification: Evening Primrose?

I noticed this pretty wildflower while walking my dog tonight. Since I didn't recognize it, I did a little research when I got home but still not certain what it is. Could it be Evening Primrose?

 It looks similar to the photos I found but not exactly the same. If any of our readers know what type of wild flower this is, please do tell us in the comments.

Here's a good wildflower website that has a wildflower identification tool. According to the tool, the closest thing to this flower is Evening Primrose (but still not totally convinced)

Check out the My Wildflowers website here.