Aristida adscensionis, commonly known as sixweeks threeawn, is an annual grass that is native to open woodlands, grasslands, and scrub areas in the Americas, though it has become nearly cosmopolitan in distribution. It is particularly adapted to warm, dry climates and is often found in disturbed sites, which can include roadsides and overgrazed pastures. This species typically forms tufts ranging from 2 to 31 inches tall and is characterized by its narrow inflorescence of spikelets, each bearing a fruit with three distinctive awns that can aid in seed dispersal.

Sixweeks threeawn is valued for its ability to quickly colonize and stabilize disturbed soils, preventing erosion. It is also used in wildflower meadows and as a low-maintenance grass in xeriscaping due to its drought tolerance. In cultivation, it prefers full sun exposure and can thrive in a variety of soil types, provided they are well-drained. While it requires minimal water once established, it can benefit from occasional irrigation during prolonged dry periods. However, due to its weedy nature, it can become invasive outside its native range and may outcompete other species. Gardeners should be cautious when introducing it to areas where it is not native.CC BY-SA 4.0