一品红又名“圣诞花”，生于下部的叶片为绿色。茎顶苞叶花瓣化，颜色艳丽是主要的观赏部分，人们习惯称此苞叶为花，其实真正的花是在数片苞叶中央蔟生的杯状数朵黄色花序。花期１１月下旬至次年４月上旬开放，花朵宏伟。大方，久开不败，有最美不过“夕阳红”之说，故又称老 Poinsettia, also known as “Christmas flower”, was born in the lower part of the leaves green. Hedge of leaf stem petal, brightly colored is the main part of the ornamental, people used to call this flower as a hibiscus, in fact, the real flower is a few pieces of biloba central goblet born goblet several yellow flower inflorescence. Flowering from late November to early April next year opening, magnificent flowers. Generous, long open unbeaten, there is the most beautiful, but “sunset red” said, it is also known as the old