Arrhenatherum
Template:Short description Template:Automatic taxobox
Arrhenatherum, commonly called oat-grass or button-grass, is a genus of Eurasian and North African plants in the grass family.<ref>Template:Cite web</ref><ref>Palisot de Beauvois, Ambroise Marie François Joseph. 1812. Essai d'une Nouvelle Agrostographie 55-56 descriptions in Latin, commentary in French</ref><ref>Palisot de Beauvois, Ambroise Marie François Joseph. 1812. Essai d'une Nouvelle Agrostographie plate XI (11), figure V (5) at lower left line drawings of Arrhenatherum avenaceum</ref><ref>Altervista Flora Italiana genere Arrhenatherum</ref>
Description
Wild forms can resemble wild oat (Avena) or fescue (Festuca). Oat-grasses are very common perennials with yellowish roots. The shining stems grow to a height of Template:Convert,<ref name = "Streeter">Streeter D, Hart-Davies C, Hardcastle A, Cole F, Harper L. 2009. Collins Flower Guide. Harper Collins Template:ISBN</ref> but die off in winter. The leaves are hairless with blunt ligules. The inflorescence is a panicle with two-flowered bisexual spikelets.<ref>Valdes, B. & H. Scholz. 2006. The Euro+Med treatment of Gramineae - a generic synopsis and some new names. Willdenowia 36(2): 657–669</ref>
- Species<ref name=x/><ref>The Plant List search for Arrhenatherum</ref>
- Arrhenatherum album - tall oat-grass - Mediterranean from Portugal to Cyprus
- Arrhenatherum calderae - Tenerife in Canary Islands
- Arrhenatherum elatius - false oat-grass, tall oat-grass, tall meadow oat - Eurasia + North Africa from Iceland to Canary Islands + Kazakhstan; naturalized in East Asia,<ref>Flora of China Vol. 22 Page 322 燕麦草属 yan mai cao shu Arrhenatherum P. Beauvois</ref> Australia,<ref>Atlas of Living Australia, Oatgrass, Arrhenatherum elatius (L.) P.Beauv. ex J.Presl & C.Presl</ref> New Zealand, the Americas<ref>Biota of North America Program 2013 county distribution map</ref><ref>Rosengurtt, B., B. R. A. Maffei & P. I. Artucio. 1970. Gramíneas Uruguayas [i–vii], 1–489. Universidad de la República, Montevideo</ref>
- 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<ref name=x>Template:Cite web</ref>
numerous species now considered better placed in other genera Avenula Danthoniastrum Duthiea Helictochloa Helictotrichon Sphenopholis