Lolium perenne

Lolium perenne L., Sp. Pl. 83 1753. (syn: Hordeum compressum Boiss. & Orph. [Invalid]; Lolium aechicum Rouville [Spelling variant]; Lolium agreste Roem. & Schult. [Invalid]; Lolium brasilianum Nees; Lolium canadense Bernh. ex Rouville [Invalid]; Lolium canadense Michx. ex Brouss.; Lolium cechicum Opiz; Lolium compressum Boiss. & Orph. ex Nyman [Invalid]; Lolium cristatum Pers. ex B.D.Jacks. [Invalid]; Lolium felix Rouville [Illegitimate]; Lolium glumosum Planellas; Lolium gmelinii Honck.; Lolium halleri C.C.Gmel.; Lolium jechelianum Opiz; Lolium latum Roth ex Steud. [Invalid]; Lolium marschallii Steven; Lolium montevidense Rouville [Invalid]; Lolium multiflorum subsp. ramosum Guss. ex Arcang. .; Lolium perenne var. aristulatum Schur ………; Lolium pseudoitalicum Schur [Invalid]; Lolium repens Honck.; Lolium rigidum var. compressum (Boiss.) Boiss.; Lolium rosetlanum Fig. & Delile ex Rouville [Invalid]; Lolium strictum var. compressum Boiss.; Lolium tenue L.; Lolium trabutii Hochr.; Lolium vulgare Host;                              (=) Lolium boucheanum Kunth);
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Macaronesia, N. Africa, Europe to Siberia and Himalaya: Afghanistan, Albania, Algeria, Austria, Azores, Baltic States, Belarus, Belgium, Bulgaria, Canary Is., Central European Rus, Corse, Cyprus, Czechoslovakia, Denmark, East Aegean Is., East European Russia, East Himalaya, Egypt, France, Germany, Great Britain, Greece, Hungary, Iran, Iraq, Ireland, Italy, Kazakhstan, Kirgizstan, Krasnoyarsk, Kriti, Krym, Lebanon-Syria, Libya, Madeira, Mauritania, Morocco, Nepal, Netherlands, North Caucasus, North European Russi, Northwest European R, Norway, Pakistan, Palestine, Poland, Portugal, Romania, Sardegna, Selvagens, Sicilia, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Ukraine, West Himalaya, West Siberia, Yugoslavia; Introduced into: Alabama, Alaska, Alberta, Amsterdam-St.Paul Is, Amur, Antipodean Is., Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Bahamas, Baleares, Bolivia, Brazil South, British Columbia, California, Cape Provinces, Chagos Archipelago, Chatham Is., Chile Central, Chile South, China North-Central, China South-Central, China Southeast, Colombia, Colorado, Connecticut, Costa Rica, Crozet Is., Delaware, District of Columbia, Dominican Republic, Easter Is., Ecuador, Eritrea, Falkland Is., Finland, Florida, Free State, Føroyar, Galápagos, Georgia, Greenland, Guatemala, Gulf States, Haiti, Hawaii, Honduras, Iceland, Idaho, Illinois, Indiana, Inner Mongolia, Iowa, Japan, Jawa, Juan Fernández Is., Kansas, Kentucky, Kerguelen, Kermadec Is., Khabarovsk, Korea, KwaZulu-Natal, Labrador, Lesotho, Louisiana, Maine, Malaya, Manitoba, Maryland, Massachusetts, Mauritius, Mexico Northwest, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Brunswick, New Caledonia, New Guinea, New Hampshire, New Jersey, New Mexico, New South Wales, New York, New Zealand North, New Zealand South, Newfoundland, Norfolk Is., North Carolina, North Dakota, Northern Provinces, Northern Territory, Northwest Territorie, Nova Scotia, Ohio, Oklahoma, Ontario, Oregon, Panamá, Pennsylvania, Peru, Primorye, Prince Edward I., Puerto Rico, Queensland, Québec, Rhode I., Réunion, Sakhalin, Saskatchewan, Saudi Arabia, South Australia, South Carolina, South Dakota, Sri Lanka, Tanzania, Tasmania, Tennessee, Texas, Tristan da Cunha, Uruguay, Utah, Uzbekistan, Venezuela, Vermont, Victoria, Virginia, Washington, West Virginia, Western Australia, Wisconsin, Wyoming, Yemen, Yukon, Zimbabwe as per POWO;

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Lolium perenne, common name Perennial Ryegrass or English Ryegrass, is a grass from the family Poaceae. It is native to Europe, Asia and northern Africa, but is widely cultivated and naturalised around the world.
The plant is a low-growing, tufted, hairless grass, and a bunch-type growth habit; tillering. The leaves are dark green, smooth and glossy on the lower surface, with untoothed parallel sides and prominent parallel veins on the upper surface. The leaves are folded lengthwise in bud (unlike the rolled leaves of Italian ryegrass, Lolium multiflorum) with a strong central keel, giving a flattened appearance. The ligule is very short and truncate, often difficult to see, and small white auricles grip the stem at the base of the leaf blade. Leaf sheaths at the base are usually tinged pink and hairless. Stems grow up to 90 cm. It has auricles.^[1]
The inflorescence is unbranched, with spikelets on alternating sides edgeways-on to the stem. Each spikelet has only a single glume, on the side away from the stem, and between 4 and 14 Florets without awns, unlike Italian ryegrass. The Anthers are pale yellow, and the plant flowers from May to November. Perennial ryegrass has a fibrous root system, with thick main roots and thinner lateral branches. Roots are usually arbuscular mycorrhizal.
(From Wikipedia on 20.4.13)
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Poaceae, Cyperaceae and Juncaceae Week: Poaceae- Lolium perenne L. from Kashmir-GS82 : Attachments(3). 1 post by 1 author.
Lolium perenne Linn., Sp. Pl. 1:83. 1753.

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Requesting ID of Poaceae member (Grass): 4 images- 1 high res.

Lolium perenne

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References:

POWO  The Plant List  GRIN  Flora of Pakistan  Annonated checklist of Flowering plants of Nepal  Flora of China  Wikipedia  RBG Kew: GrassBase – Lolium perenne Description  Fact sheet  Flowers of India