rye grass, short-lived perennial, leafy, tufted plant belonging to the family Gramineae (grass family). Two species are grown in the United States—Italian rye grass (Lolium multiflorum), the leading hay grass of Europe, and English, or perennial, rye grass (L. perenne). In parts of the United States where winters are mild, both are sowed, often mixed with other grains, for pasturage. Italian rye grass is much used for lawns in warmer regions of the United States. Perennial rye grass was probably the first of all perennial grasses to be cultivated pure for forage. Poison rye grass, or darnel (L. temulentum), reputed to be poisonous, grows in grain fields and waste places; it is thought to be the tare of the Bible. Rye grass is classified in the division Magnoliophyta, class Liliatae, order Cyperales, family Gramineae.

rye, cereal grain of the family Gramineae (grass family). The grain, Secale cereale, is important chiefly in Central and N Europe. It seems to have been domesticated later than wheat and other staple grains; cultivated rye is quite similar to the wild forms and no traces of it have been found among Egyptian ruins or Swiss lake dwellings. Where it grows well, wheat is preferred, but rye will produce a good crop on soil too poor or in a climate too cool to produce a good crop of wheat. The standard schwarzbrot, or pumpernickel, of Europe was formerly the major rye product. A bread of lighter color, called rye bread, is made of rye flour mixed with wheat flour. Today rye is used mostly as a stock feed (usually mixed with other grains), for hay and pasturage, for green manure, and as a cover crop. Russia leads in world production. Rye is much used as a distillers' grain in making whisky and gin. The tough straw of rye is valued for many purposes, e.g., thatching for roofs and stuffing for horse collars. Ergot is a fungus disease of rye; the fungus is poisonous and may make the rye unsafe to use. Wild rye and lyme grass are names for several grasses of the genus Elymus, some of which are occasionally planted as ornamentals or used for binding sand. Rye is classified in the division Magnoliophyta, class Liliatae, order Cyperales, family Gramineae.

Rye House Plot, 1683, conspiracy to assassinate Charles II of England and his brother James, duke of York (later James II), as they passed by Rumbold's Rye House in Hertfordshire on the road from Newmarket to London. However, the king did not make the journey on the expected day; the plot, an offshoot of earlier insurrection plots hatched by the 1st earl of Shaftesbury, was revealed. Although the actual conspirators were only minor figures, the great Whig leaders Lord William Russell and Algernon Sidney were executed on flimsy evidence of guilt by association.

Rye, town (1991 pop. 4,127), East Sussex, SE England, on the Rother River. It is a tourist resort and small port with boatbuilding and netmaking industries. Rye was one of the "ancient towns" added to the Cinque Ports. It had a thriving trade in the 17th cent. but decayed after the recession of the sea early in the 19th cent. There are remains of an ancient friary, a large Norman and Early English church, the 12th-century Ypres Tower, and the Thomas Peacocke school (1636). The dramatist John Fletcher was born in Rye.

Rye, city (1990 pop. 14,936), Westchester co., SE N.Y., a suburb of New York City, on Long Island Sound; settled 1660, inc. as a city 1942. It is chiefly residential, with a cancer-research center, a hardware and locks manufacturing company, and several corporate offices. In colonial times, Rye was the first stop on the Boston Post Road after New York City. The old Square House, an inn where many Revolutionary notables stayed, is now a museum. Playland, a large county-owned amusement park, is on the beach there. Chief Justice John Jay is buried in Rye.

Cereal grass (Secale cereale) and its edible grain, used to make rye bread and rye whiskey, as livestock feed, and as a pasture plant. Native to South Asia, today it is grown extensively in Europe, Asia, and North America. It is planted mainly where climate and soil are relatively unfavourable for other cereals and as a winter crop where temperatures are too cold for winter wheat. Rye thrives at high altitudes and is the most winter-hardy of all small grains. It is high in carbohydrates and provides small quantities of protein, potassium, and B vitamins. Only rye and wheat have the necessary qualities to make a loaf of bread, but rye lacks the elasticity of wheat and thus is frequently blended with wheat flour. The tough fibrous straw of rye is used for animal bedding, thatching, mattresses, hats, and paper. Rye may be grown as a green manure crop.

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(1683) In English history, an alleged Whig conspiracy to assassinate Charles II because of his pro-Catholic policies. The plot drew its name from Rye House at Hoddesdon, Hertfordshire, near the road where Charles was supposed to be killed as he traveled from a horse meet. The king's unexpected early departure supposedly foiled the plot, which was later revealed by an informer. The facts remained cloudy, but the main plotters included the duke of Monmouth, Lord William Russell, Algernon Sidney (1622–83), and Sir Thomas Armstrong. The last three were tried, convicted of treason, and beheaded.

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