Oloptum miliaceum, commonly known as smilograss, is a clumping perennial grass originally native to temperate regions of Eurasia. It has been introduced to various other parts of the world, where it can become invasive. Smilograss typically grows in open areas such as grasslands, meadows, and along roadsides. It forms dense tufts that can reach up to 3 feet (1 meter) in height and width, with narrow, arching leaves. The plant produces small, inconspicuous flowers during the summer months, which are not particularly showy but can contribute to its invasive spread through prolific seed production.

Smilograss is valued for its ability to form dense ground cover quickly, making it useful for erosion control and as a turf alternative in some regions. However, its invasive potential requires careful consideration before planting. It is drought-tolerant and can thrive in a range of soil types, from sandy to clay, provided they are well-drained. Smilograss prefers full sun but can tolerate partial shade. In cultivation, it requires minimal maintenance once established but may need to be contained to prevent unwanted spread.CC BY-SA 4.0