狗牙根属（学名：Cynodon）是禾本科下的一个属，为多年生、矮小草本植物。该属共有约10种，分布于东半球热带地区。

Cynodon is a genus of plants in the grass family. It is native to warm temperate to tropical regions of the Old World, as well as being cultivated and naturalized in the New World and on many oceanic islands.

The genus name comes from Greek words meaning "Dog-tooth". The genus as a whole as well as its species are commonly known as Bermuda Grass or Dog's Tooth Grass.