That last picture has an interesting addition.....
Truly, Mike, I don't think that looks like Lemon Chiffon. For one thing, LC has a very distinct, sweet lemony scent that is quite strong. Secondly, it is quite a bit more yellow. Let me post a picture.
Now you very cleverly posted a picture of the leaves, and I find that LC often has 'bleached' splotches (small ones, like paint splatters) on the edge of some of the leaves. If you see that you can be pretty sure it is LC. Do you notice anything like that?
The flower on the right looks like it may be a common white.