Blue Couch

This species is a mat-forming perennial grass with rhizomes and stolons. The stems can reach up to 63 centimeters long, but are generally 15 to 30 centimeters, with a creeping form, extending along the ground and rooting at the stem nodes. The narrow leaf blades are up to 7 centimeters long, usually hairless, and green to blue-green in color. The inflorescence has 2 to 4 thin, finger-like branches each up to 7 to 10 centimeters long. They are lined with pairs of small spikelets each under 3 millimeters long. The grass can grow into a dense, leafy stand up to 20 centimeters tall unless it is kept down, for example, with grazing. This species is similar to southern crabgrass (Digitaria ciliaris), but with fewer, narrower inflorescence branches. It is also similar to bermudagrass (Cynodon dactylon), but with shorter, wider leaves which are more blue in color.

This species has long been used as a pasture grass for grazing livestock. Animals find it palatable. It is also planted as a lawn and used as golf course turf. It is thought to be "one of the most popular lawn grasses in Queensland." It may be used as other forms of groundcover. It is very good for erosion control. Cultivars include 'Aussiblue' and 'Tropika', grey-green grass breeds recommended for turf use.