Tridens muticus is a species of grass known by the common name slim tridens. It is native to Mexico and the southwestern quadrant of the United States, where it grows several types of habitat, including plateau and desert, woodlands, sagebrush, plains, and other areas with dry sandy and clay soils.
It is a perennial grass forming a thick tuft with a knotted base and rhizome. It reaches a maximum height of 50 to 80 centimeters. The panicle has short branches appressed to the others, making the inflorescence narrow. The florets are generally purple in color.