延龄草属（学名：Trillium）是延龄草科下的一个属，为直立、不分枝草本植物。该属共有约30种，分布于东亚和北美的温带地区。

此属植物为多年生草本植物，植株自根茎长出。其种子则由蚂蚁传播。

Trillium (trillium, wakerobin, tri flower, birthroot, birthwort) is a genus of perennial flowering plants native to temperate regions of North America and Asia.

It was formerly treated in the family Trilliaceae or trillium family, a part of the Liliales or lily order. The APG III system includes Trilliaceae in the family Melanthiaceae, where can be treated as the tribe Parideae.