I can't remember how I stumbled on Charles Burchfield's work, but when I saw it, I lost my mind. The color palettes are stunning and I love the way he almost paints around the subject matter, it's all just so unique and interesting. And most of these paintings were done in the late 1910's and early 1920's which I found really fascinating.
Here are a few examples of his work. I hope you find it as interesting as I do. He has a few books in publication, which are totally worth buying. Check amazon for book titles and wikipedia for more info about this amazing artist that more people should know about.