Poa pratensis

Poa pratensis L., Sp. Pl. 67 1753. (Syn: Paneion pratense (L.) Lunell ………………………………………………………);
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Subarctic to Temp. Northern Hemisphere and N. Mexico: Afghanistan, Alabama, Alaska, Albania, Alberta, Altay, Amur, Arizona, Arkansas, Austria, Baltic States, Belarus, Belgium, British Columbia, Bulgaria, Buryatiya, California, Central European Rus, China North-Central, China South-Central, China Southeast, Chita, Colorado, Connecticut, Corse, Cyprus, Czechoslovakia, Delaware, Denmark, District of Columbia, East Aegean Is., East European Russia, East Himalaya, Finland, Florida, France, Føroyar, Georgia, Germany, Great Britain, Greece, Greenland, Hungary, Iceland, Idaho, Illinois, Indiana, Inner Mongolia, Iowa, Iran, Iraq, Ireland, Irkutsk, Italy, Jawa, Kamchatka, Kansas, Kazakhstan, Kentucky, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kriti, Krym, Kuril Is., Lebanon-Syria, Louisiana, Magadan, Maine, Manchuria, Manitoba, Maryland, Massachusetts, Mexico Northeast, Mexico Northwest, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Myanmar, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Guinea, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Caucasus, North Dakota, North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ohio, Oklahoma, Ontario, Oregon, Pakistan, Pennsylvania, Philippines, Poland, Portugal, Primorye, Prince Edward I., Qinghai, Québec, Rhode I., Romania, Sakhalin, Sardegna, Saskatchewan, Sicilia, South Carolina, South Dakota, South European Russi, Spain, Svalbard, Sweden, Switzerland, Tadzhikistan, Tennessee, Texas, Tibet, Transcaucasus, Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Ukraine, Utah, Uzbekistan, Vermont, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Wisconsin, Wyoming, Xinjiang, Yakutskiya, Yemen, Yugoslavia, Yukon; Introduced into: Aleutian Is., Algeria, Amsterdam-St.Paul Is, Antipodean Is., Argentina Northeast, Argentina Northwest, Argentina South, Azores, Bermuda, Bolivia, Brazil South, Canary Is., Cape Provinces, Chatham Is., Chile Central, Chile North, Chile South, Costa Rica, Crozet Is., Dominican Republic, Ecuador, Falkland Is., Free State, Haiti, Hawaii, Jamaica, Japan, Kerguelen, KwaZulu-Natal, Labrador, Lesotho, Madeira, Marion-Prince Edward, Mexico Central, Mexico Gulf, Mexico Southwest, Morocco, New South Wales, New Zealand North, New Zealand South, Newfoundland, Norfolk Is., Northern Provinces, Peru, Puerto Rico, Réunion, South Australia, South Georgia, Sri Lanka, St.Helena, Taiwan, Tasmania, Tristan da Cunha, Uruguay, Victoria, Western Australia as per POWO;

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Poa pratensis, commonly known as Kentucky Bluegrass, Smooth Meadow-grass, or Common Meadow-grass, is a perennial species of grass native to Europe, Asia, North America, and northern Africa.
Poa pratensis is a herbaceous perennial plant 30–70 centimetres (12–28 in) tall. The leaves have boat-shaped tips, narrowly-linear, up to 20 centimetres (8 in) long and 3–5 millimetres (0.12–0.20 in) broad, smooth or slightly roughened, with a rounded to truncate ligule 1–2 millimetres (0.039–0.079 in) long. The conical panicle is 5–20 centimetres (2–8 in) long, with 3 to 5 branches in the basal whorls; the oval spikelets are 3–6 millimetres (0.12–0.24 in) long with 2 to 5 florets, and are purplish-green or grey. They are in flower from May to July, compared to Annual Meadowgrass (Poa annua) which is in flower for eight months of the year. Poa pratensis has a fairly prominent mid vein [center of the blade]
The ligule is extremely short and square ended, making a contrast with Annual Meadowgrass (Poa annua) and Rough Meadowgrass (Poa trivialis) in which it is silvery and pointed. The Kentucky bluegrass is a dark green compared to the apple green color of poa annua and poa trivialis.
(From Wikipedia on 26.4.13)
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Poaceae, Cyperaceae and Juncaceae Week: Poaceae- Sorghum halepense from Kashmir-GS105 : Attachments (3). 5 posts by 2 authors.
Sorghum halepense (Linn.) Pers., Syn. Pl. 1:101. 1805.
Common grass in Kashmir on mountain slopes and forest areas. Photographed from Gulmarg in June, 2010.

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Thanks for correction … What about these two from Delhi?

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The first three photographs were from Gulmarg, which I think you are right should be Poa pratensis.
The photographs uploaded Delhi above, and three places in Srinagar at lower altitudes (I am attaching here) I hope belong to S. halepense. Pl. give your verdict.

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Yes. The three are S. halepense

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References:

POWO  The Plant List  GRIN  Flora of Pakistan  Annonated checklist of the flowering plants of Nepal  Flora of China Wikipedia