In the south its just greens, turnips, collards, mustard, Swiss chard, kale. next time you cook fresh greens, clean and stem, ruff chop, large pot with a little water, 2 slices of good bacon to Cris cross the top. Now the secret ingredient........ 1/2 t. of sugar. It kills all the bitter of the greens. You can't taste it. Without the bit of sugar, its the dark ages and you are eating grass.
They also make a wonderful wilted salad with bacon bits and a hot mustard vinaigrette. Oh my word!
They are all just weeds and grasses we have learned we can eat.
Oh and baby spinach...... creamed. Turnip greens with boiled eggs, did I mention Dandiloins the weeds? Collards are like Mustard greens only milder....
Louisiana actually has a Z'herbes gumbo made with just greens, its a norm for Thursday before the Good Friday fast before Easter. Some stories say its for good Friday 'cause its meatless, but they are always cooked with some ham, sausage, andouille so the coonass usually have it on Thursday. You'd be amazed the depth some little old ladies can coax out of weeds.
LOL.. I forgot, no matter how clean greens look, always wash 'em, I don't know where they hide all that dirt.