The Poinsettia can be found under Decorations-Plants.
When you are near the Poinsettia Plant, you will get one of two 2 hour buffs.
One buff happens normally, the other happens if you have a cat in your family.
The second buff only works for those who have the Cats and Dogs Expansion Pack.
This feature, if deemed annoying, can be turned off by clicking on the plant.
Look through the slideshow above to see the new features.