An African-American family moved in behind us. She was talking gardening with Wife and asked about a red-stemmed green and if the leaves boiled up nice-like. Wife was Polish as well as South-Side, so NO!!! It was rhubarb, the stems are tasty but the leaves contain loads of oxalic acid, which will cause your calcium to solidify in crystals in your bloodstream. I didn’t test it because the only time she responded that loud and fast was when I asked if the tiny, purple berries on a weedy shrub were tasty. Something about ‘deadly’ nightshade. :o