Please help me figure out a dish from the past.

Need some help trying to get some information on something that my grandmother used to cook when I was a kid. It was some kind of greens that she used to smother like mustard greens. It grew wild down here in south La and we used to call it "Morell". I have no idea the actual spelling because I have never seen it written. Anyone have any idea what I'm talking about? My sister said that she thinks knightshade is a more common name for it but that is just a large group of plants and I couldn't find what I'm referring to.