Rumex Crispus - Curly Dock - The Dock Question??

We have dock in our yard. I tasted it. The leaves are a bit old in July, but still tasted pretty good. I think it is probably curly dock. The leaves are a bit wavy and curly. It could possibly be Western Dock. Not sure. I need to figure out how to tell them apart.

http://biology.burke.washington.edu/herbarium/imagecollection.php?ID=3501