Hmmn... not sure, but I think I am looking at a poinsettia left over from the holidays, which has lost most of its foliage?? PS: Helena, I deleted the other duplicate post. It is confusing to have the thread going in two places. Better to keep the conversation in one thread.
I was leaning towards Poinsettia myself; but mine tend to go completely deciduous (ie lose all their leaves) after blooming and I have never really paid attention to what they look like in the stage between no leaves and plenty.
I agree with my fellow greenthumbs. Looks like one of the Poinsettias we had here at the office for a little while after Christmas time.