Papaver rhoeas, with common names including common poppy, corn poppy, corn rose, field poppy, Flanders poppy, red poppy, and Odai, is an annual herbaceous species of flowering plant in the poppy family Papaveraceae. It is native to north Africa and temperate Eurasia and is introduced into temperate areas on all other continents except Antarctica. It is regarded as an agricultural weed (hence the common names including "corn" and "field"). As the plant thrives in areas of disturbed soil, it was often abundant in agricultural fields before the advent of herbicides. Flushes of poppies may still appear in fields where herbicides are not used, as well as those in fallow. The corn poppy and its cultivars such as the Shirley poppy are widely grown in gardens, and are frequently found in packets of seed labelled "wildflower mixes". Since World War I, it has been used in the Commonwealth as a symbol of remembrance for fallen soldiers because it commonly grew in fields disturbed by war.
Description
Papaver rhoeas is a variable, erect annual, forming a long-lived soil seed bank that can germinate when the soil is disturbed. In the Northern Hemisphere it generally flowers in late spring (between May and October in the UK) but if the weather is warm enough other flowers frequently appear at the beginning of autumn. It grows up to about 70 centimetres (28 inches) in height. The stems hold single flowers, which are large and showy, 5–10 cm (2–4 in) across, with four petals that are vivid red, most commonly with a black spot at their base. The petals slightly overlap each other. The plant can produce up to 400 flowers in a warm season, that last only one day. The flower stem is usually covered with coarse hairs that are held at right angles to the surface, helping to distinguish it from P. dubium in which the hairs are more usually appressed (i.e. held close to the stem). The capsules are hairless, obovoid (egg-shaped), less than twice as tall as they are wide, with a stigma at least as wide as the capsule. Like many other species of Papaver, the plant exudes white to yellowish latex when the tissues are broken. Not all corn poppies that are available commercially have red flowers. Selective breeding has resulted in cultivars in yellow, orange, pink, and white. The Shirley poppy is a well-known cultivar. A very pale speckled variety, derived from the Shirley, is also available. A nearly black-flowering hybrid, known as 'Evelina', was bred in Italy in the late 1990s, with P. dubium, but does not appear to be available commercially.
Phytochemistry Papaver rhoeas contains the alkaloid called rhoeadine, which is a mild sedative. Rhoeadic acid, papaveric acid and rhoeagenine are also found in this plant.
Taxonomy It was formally described by the Swedish botanist Carl Linnaeus in his seminal publication Species Plantarum in 1753. Papaver is the Latin word for poppy and rhoeas means the corn poppy in Greek. It is classified within the genus Papaver as part of the family Papaveraceae and has two subspecies and one variety that are listed as accepted by Plants of the World Online.
Papaver rhoeas var. himerenseThis variety was described by Francesco Maria Raimondo and Vivienne Spadaro in 2007. It is endemic to the island of Sicily. Papaver rhoeas subsp. polytrichumThis subspecies was described as a species named Papaver polytrichum by Pierre Edmond Boissier and Theodor Kotschy in 1856. It was reclassified as a subspecies of Papaver rhoeas by Joseph Thiébaut in 1936. It is native to the eastern Mediterranean. Papaver rhoeas subsp. rhoeasThe autonymic subspecies is native to Europe, North Africa, and western Asia and has been introduced to many other parts of the world. Papaver rhoeas has 126 synonyms of the species or one of its two subspecies.
Natural history
Its origin is not known for certain. As with many such plants, the area of origin is often ascribed by Americans to Europe, and by northern Europeans to southern Europe. It is known to have been associated with agriculture in the Old World since early times and has had an old symbolism and association with agricultural fertility. It has most of the characteristics of a successful weed of agriculture. These include an annual lifecycle that fits into that of most cereals, a tolerance of simple weed control methods, the ability to flower and seed itself before the crop is harvested, and the ability to form a long-lived seed bank. The leaves and latex have an acrid taste and are mildly poisonous to grazing animals. A sterile hybrid with P. dubium is known, P. × hungaricum, that is intermediate in all characteristics with P. rhoeas. P. rhoeas topped the list in a UK study of meadow pollen production, on a per flower basis, with its rate of 13.3 ± 2.8 μl. The California poppy placed second with a rate of 8.3 ± 1.1 μl. The pollen production of P.rhoeas, on a per flower basis, was very high in comparison with the other plants tested, at almost triple the amount of the top-ranked perennial (a mallow). When sampled at the level of the entire capitulum, however, it was outranked by the ox-eye daisy, Leucanthemum vulgare, with its 15.9 ± 2 μl measurement. It tied with Cosmos bipinnatus. Neither poppy produced a significant quantity of nectar, making their role in meadow ecology specific to pollen-gathering/consuming insects. As poppies are not wind-pollinated, their pollen poses no allergy risk via inhalation.
Distribution and habitat The species is found within Africa, in Algeria, Egypt, Libya, Morocco, Tunisia, Madeira Islands, and the Canary Islands. Within temperate Asia, it is found in the Caucasus regions of Armenia, Azerbaijan, Georgia, and Ciscaucasia. In Western Asia, it is found in Afghanistan, Cyprus, Egypt, Iran, Iraq, Palestine, Israel, Jordan, Lebanon, Syria and Turkey. Within tropical Asia, it is found in Pakistan and India. Within Europe, it is found in Belarus, Latvia, Lithuania, Moldova, Ukraine, Austria, Belgium, Czech Republic, Germany, Hungary, Netherlands, Poland, Slovakia, Switzerland, Denmark, Ireland, Norway, Sweden, the United Kingdom, Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Greece, Italy, Kosovo, North Macedonia, Montenegro, Romania, Serbia, Slovenia, France, Portugal, and Spain. It grows in fields, beside roads, and on grasslands. It is hardy to between USDA Zone 8 and Zone 10, or down to 10 °F (−12 °C).
… excerpt ends here. Continue reading the full article.
