Grahm Junior College History of Kenmore Square

By Gafarshod Jumat, 28 Oktober 2016

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Narcissus /n?:r's?s?s/ is a genus of mostly spring perennial plants in the Amaryllidaceae (amaryllis) family. Various common labels including daffodil,[notes 1] daffadowndilly,[3] narcissus, and jonquil are used to describe all or some members of the genus. Narcissus has conspicuous flowers with six petal-like tepals surmounted by way of a cup- or trumpet-shaped corona. The blooms are usually white or yellow (orange or red in garden kinds), with either even or contrasting colored tepals and corona.

Narcissus were popular in historic civilisation, both medicinally and botanically, but formally described by Linnaeus in his Varieties Plantarum (1753). The genus is normally thought to have about ten portions with approximately 50 species. The true amount of kinds has assorted, depending how they are labeled, scheduled to similarity between kinds and hybridization. The genus arose some right time in the Late Oligocene to Early Miocene epochs, in the Iberian peninsula and adjacent areas of southwest Europe. The precise source of the real name Narcissus is unfamiliar, but it is linked to a Greek expression for intoxicated (narcotic) and the myth of the youngsters of this name who fell in love with his own reflection. The English term 'daffodil' is apparently produced from "asphodel", with which it was compared commonly.

The types are local to meadows and woods in southern Europe and North Africa with a center of diversity in the European Mediterranean, particularly the Iberian peninsula. Both wild and cultivated plants have naturalised widely, and were presented in to the ASIA to the tenth hundred years prior. Narcissi have a tendency to be long-lived bulbs, which propagate by division, but are also insect-pollinated. Known pests, diseases and disorders include viruses, fungi, the larvae of flies, mites and nematodes. Some Narcissus species have become extinct, while some are threatened by increasing tourism and urbanisation.

Historical accounts suggest narcissi have been cultivated from the earliest times, but became ever more popular in Europe following the 16th century and by the later 19th hundred years were an important commercial crop centred generally on holland. Narcissi are popular as trim blossoms so that as ornamental crops in private and public gardens today. The long history of breeding has resulted in thousands of different cultivars. For horticultural purposes, narcissi are classified into divisions, covering an array of colours and shapes. Like other members of these family, narcissi produce a true number of different alkaloids, which provide some protection for the plant, but may be poisonous if ingested inadvertently. This property has been exploited for medicinal utilization in traditional healing and has resulted in the production of galantamine for the treating Alzheimer's dementia. Long celebrated in literature and artwork, narcissi are associated with a true number of themes in various cultures, ranging from loss of life to good fortune, and as symbols of planting season. The daffodil is the countrywide flower of Wales and the image of cancer charities in many countries. The looks of the outdoors flowers in springtime is associated with celebrations in many places.

Narcissus is a genus of perennial herbaceous bulbiferous geophytes, dying back again after flowering to the underground storage bulb. They regrow in the following season from brown-skinned ovoid light bulbs with pronounced necks, and reach heights of 5-80 cm depending on the species. Dwarf varieties such as N. asturiensis have a maximum height of 5-8 cm, while Narcissus tazetta might increase as tall as 80 cm.

The plant life are scapose, having an individual central leafless hollow bloom stem (scape). Several blue-green or green, narrow, strap-shaped leaves come up from the light bulb. The flower stem usually bears a solitary flower, but once in a while a cluster of plants (umbel). The blooms, which are conspicuous and white or yellow usually, both or seldom inexperienced sometimes, consist of a perianth of three parts. Closest to the stem (proximal) is a floral tube above the ovary, then an outer ring composed of six tepals (undifferentiated sepals and petals), and a central disk to conical molded corona. The flowers may suspend down (pendent), or be erect. You will discover six pollen bearing stamens encompassing a central style. The ovary is second-rate (below the floral parts) comprising three chambers (trilocular). The berry consists of a dry out capsule that splits (dehisces) liberating numerous black seeds.

The bulb is placed dormant after the leaves and rose stem die back and has contractile origins that draw it down further in to the soil. The bloom leaves and stem form in the light bulb, to emerge the following season. Most varieties are dormant from summer season to later winter, flowering in the spring and coil, though a few types are fall flowering.

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