[2] It is native to the Americas but it is distributed nearly worldwide.

It grows easily in disturbed and waste areas and has potential to become a weed.

[3] This annual bunchgrass is quite variable in appearance, its size and shape determined largely by environmental conditions.

It grows in a tuft to heights between 5 and 80 centimeters.

It forms a narrow inflorescence of spikelets, each fruit with three awns.