Flowers are a part  of the festive holiday decorations.  Some are even named for the holidays. Thanksgiving and Christmas cactus bloom in shades of white, pink and red all through the holidays. They are hardy plants needing very little care, but it is important to remember that even though we call them cactus, they are not desert plants. Thanksgiving and Christmas cactus are actually a part of the Schlumbergera family, natives of moist tropical…