Any of various plants of the genus Trillium, of North America, the Himalaya Mountains, and eastern Asia, usually having a single cluster of three leaves and a variously colored, three-petaled flower.

• 延龄草一种延龄草属的植物，产于北美洲、喜马拉雅山脉和东亚，通常有三片轮生的叶和各种颜色的三瓣花