According to Wikipedia, poinsettia is explained as follows:
The photos in this page show beautiful floral arrangement using poinsettia. During the winter season we can find poinsettia quite often. The color of most poinsettia we see in our daily is red although there are other color ones such as white etc. The source of these photos is Better Homes and Gardens that introduces seasonal floral decoration from season to season. During Christmas holidays, we place poinsettia centerpieces around a Christmas tree at home and people enjoy viewing this beautiful "flower".