Arrhenatherum

Arrhenatherum, commonly called oatgrass or button-grass, is a genus of Eurasian and North African plants in grass family.[4][5][6][7]

Arrhenatherum
tall oatgrass (Arrhenatherum elatius)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Subfamily: Pooideae
Supertribe: Poodae
Tribe: Poeae
Subtribe: Aveninae
Genus: Arrhenatherum
P.Beauv.
Type species
Arrhenatherum avenaceum
Synonyms[3]
  • Thorea Rouy 1913, illegitimate homonym not Bory 1808 (Rhodophyta) nor Briq. 1902 (Apiaceae)
  • Pseudarrhenatherum Rouy
  • Thoreochloa Holub

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.[8]

Species[3][9]
  • 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,[10] Australia,[11] New Zealand, the Americas[12][13]
  • 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[3]

numerous species now considered better suited to other genera: Avenula Danthoniastrum Duthiea Helictochloa Helictotrichon Sphenopholis

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See also

References
  1. lectotype designated by L.K. Pfeiffer, Nom. 1: 274 (1872)
  2. Tropicos, Arrhenatherum P. Beauv.
  3. "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew".
  4. Watson L, Dallwitz MJ. (2008). "The Grass Genera of the World: Arrhenatherum". The Grass Genera of the World. Retrieved 2009-08-19.
  5. Palisot de Beauvois, Ambroise Marie François Joseph. 1812. Essai d'une Nouvelle Agrostographie 55-56 descriptions in Latin, commentary in French
  6. 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
  7. Altervista Flora Italiana genere Arrhenatherum
  8. Valdes, B. & H. Scholz. 2006. The Euro+Med treatment of Gramineae - a generic synopsis and some new names. Willdenowia 36(2): 657–669
  9. The Plant List search for Arrhenatherum
  10. Flora of China Vol. 22 Page 322 燕麦草属 yan mai cao shu Arrhenatherum P. Beauvois
  11. Atlas of Living Australia, Oatgrass, Arrhenatherum elatius (L.) P.Beauv. ex J.Presl & C.Presl
  12. Biota of North America Program 2013 county distribution map
  13. Rosengurtt, B., B. R. A. Maffei & P. I. Artucio. 1970. Gramíneas Uruguayas [i–vii], 1–489. Universidad de la República, Montevideo
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