A mat-forming perennial grass(Cynodon dactylon), widespread in warm regions and important as a lawn and pasturage grass in the southern United States.It is also common as a weed.

• 狗牙根草，百慕大草：一种丛状多年生草（狗牙根 狗牙根属）， 遍生于温暖地区，是美国南部草坪和牧场草的重要来源。