Poinsettia is a popular ornamental plant known for its vibrant red and green foliage, commonly associated with Christmas. Scientifically named Euphorbia pulcherrima, it is native to Mexico and is often used in holiday decorations. The colorful bracts, which are often mistaken for petals, are actually modified leaves surrounding small yellow flowers. Poinsettias require specific care, including bright, indirect light and careful watering, to thrive indoors.