异蕊草属（学名：Thysanotus）是百合科下的一个属，为多年生草本植物。该属共有22种，分布于大洋洲和东南亚。

Thysanotus is a genus of perennial herbs in the family Asparagaceae, subfamily Lomandroideae. They are mostly native to Australia with 45 of the 50 known species occurring in Western Australia alone, although a few species range northward into New Guinea and Southeast Asia as far north as southern China.