Hilaria mutica, commonly known as Tobosagrass, is a semi-evergreen perennial grass native to arid and semi-arid regions, including deserts, grasslands, and scrublands in the Southwestern and South Central USA and Northern Mexico. It forms dense sod through its rhizomatous growth habit and typically reaches 30 to 60 cm (0.98 to 1.97 ft) in height, with occasional specimens growing up to 90 cm (3.0 ft). The inflorescence of Tobosagrass is modest, a few centimeters long, and can vary in color from white to straw or purplish. The spikelets are distinctive, grouped in clusters of three.

Tobosagrass is valued for its drought tolerance and ability to stabilize soil, making it useful for erosion control in arid landscapes. It is also used for low-maintenance naturalistic plantings and restoration projects. While it reproduces mainly through its rhizomes, it rarely produces viable seeds. The plant is known to be susceptible to ergot, a fungal disease that can affect many grass species. For optimal growth, Tobosagrass requires full sun to part shade, minimal water once established, and well-drained soils. It is not commonly found in ornamental horticulture but is important in rangeland management and habitat restoration.CC BY-SA 4.0