Well, almost nothing...
Traditional, natural Christmas cacti, paperwhites, and a poinsettia are the limits of our festorations. And to be fair, only the paperwhites come out for Christmas. And while the poinsettia is new this year, the last one was five years old (I think) and spent the summers outdoors (and you try living with a bathroom that *must* be dark for 12 hours a day for a few months...). Thinking a little more about it, it does seem that someone decorated the asparagus fern, too.