Oloptum miliaceum

{{Short description|Species of grass}}

{{Speciesbox

| name = Oloptum miliaceum

| image = Piptatherummiliaceum.jpg

| genus = Oloptum

| species = miliaceum

| authority = (L.) Röser & Hamasha

| synonyms = *Piptatherum miliaceum {{au|(L.) Coss.}}

• Oryzopsis miliacea {{au|(L.) Asch. & Schweinf.}}
• Stipa miliacea {{au|(L.) Hoover}}

}}

Oloptum miliaceum{{Cite journal |last1=Hamasha |first1=Hassan R. |last2=von Hagen |first2=K. Bernhard |last3=Röser |first3=Martin |date=2012-02-01 |title=Stipa (Poaceae) and allies in the Old World: molecular phylogenetics realigns genus circumscription and gives evidence on the origin of American and Australian lineages |url=http://link.springer.com/10.1007/s00606-011-0549-5 |journal=Plant Systematics and Evolution |language=en |volume=298 |issue=2 |pages=351–367 |doi=10.1007/s00606-011-0549-5 |bibcode=2012PSyEv.298..351H |s2cid=254057542 |issn=0378-2697|url-access=subscription }} is a species of grass known by the common name smilograss.{{PLANTS|id=PIMI3|taxon=Piptatherum miliaceum|accessdate=6 October 2015}} It is native to Eurasia but it can be found in many other parts of the world as an introduced species and a casual weed of disturbed areas. It is a clumping perennial grass producing sturdy, erect stems that can reach 1.5 meters tall. The inflorescence is a panicle of several whorls of branches that divide into secondary branches bearing clusters of spikelets.