I think I winter sowed the seed that produced this plant but I do not know for sure what it is. I am thinking that maybe it is a Moon Flower plant. Can anyone identify it for me?

common names... on my side of the country, Moonflower is usually a morning glory. I can see where this Datura could have the same common name though, and it's a pretty one. Looking at the leaves, I'm not sure it is Datura. Just looked it up and is appears to be Datura stramonium. (edited for spelling)

Night-blooming Daturas are also often referred to as moonflowers.
Jimson Weed (Datura stramonium)