by Charlotte Perkins Gilman.
Anyone read it? It's a pretty good story. Apart from A Streetcar Named Desire and Catcher in the Rye this has been my favorite piece on the syllabus for my American literature class. I'm actually writing a paper on it right now. It's been interesting to analyze it and kind of pick it apart.
You should definitely read it if you haven't already.
http://www.library.csi.cuny.edu/dept/history/lavender/wallpaper.html
The ending is just...creepy.