Arrhenatherum, commonly called oatgrass or button-grass, is a genus of Eurasian and North African plants in the grass family. Description Wild forms can resemble wild oat (Avena) or fescue (Festuca). Oatgrasses are very common perennials with yellowish roots. The shining stems grow to a height of 1.5 meters, but die off in winter. The leaves are hairless with blunt ligules. The inflorescence is a panicle with two-flowered bisexual spikelets. Species Arrhenatherum album - tall oatgrass - Mediterranean from Portugal to Cyprus Arrhenatherum calderae - Tenerife in Canary Islands Arrhenatherum elatius - false oatgrass, tall oatgrass, tall meadow oat - Eurasia + North Africa from Iceland to Canary Islands + Kazakhstan; naturalized in East Asia, Australia, New Zealand, the Americas Arrhenatherum kotschyii - Turkey, Caucasus, Syria, Lebanon, Palestine, Jordan, Iraq, Iran, Afghanistan Arrhenatherum longifolium - France, Spain, Portugal, Morocco Arrhennatherum palaestinum - eastern Mediterranean from Greece to Iraq Arrhenatherum pallens - Portugal formerly included numerous species now considered better suited to other genera: Avenula Danthoniastrum Duthiea Helictochloa Helictotrichon Sphenopholis See also List of Poaceae genera References Pooideae Poaceae genera Taxa named by Palisot de Beauvois