Narcissus /n?:r's?s?s/ is a genus of mostly spring perennial vegetation in the Amaryllidaceae (amaryllis) family. Various common titles including daffodil,[notes 1] daffadowndilly,[3] narcissus, and jonquil are used to describe all or some known members of the genus. Narcissus has conspicuous flowers with six petal-like tepals surmounted by the cup- or trumpet-shaped corona. The plants are usually white or yellow (orange or green in garden types), with either standard or contrasting colored tepals and corona.
Narcissus were well known in historical civilisation, both and botanically medicinally, but formally described by Linnaeus in his Types Plantarum (1753). The genus is normally thought to have about ten sections with about 50 species. The amount of varieties has varied, depending how they are classified, anticipated 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 origin of the name Narcissus is mysterious, but it is associated with a Greek term for intoxicated (narcotic) and the myth of the junior of this name who fell in love with his own representation. The English word 'daffodil' is apparently produced from "asphodel", with which it was compared commonly.
The varieties are local to meadows and woods in southern Europe and North Africa with a middle of variety in the American Mediterranean, the Iberian peninsula particularly. Both cultivated and wild plants have naturalised widely, and were introduced into the Far East before the tenth century. Narcissi tend to be long-lived bulbs, which propagate by division, but are also insect-pollinated. Known pests, disorders and diseases include viruses, fungi, the larvae of flies, nematodes and mites. Some Narcissus species have become extinct, while some are threatened by increasing urbanisation and tourism.
Historical accounts suggest narcissi have been cultivated from the earliest times, but became ever more popular in Europe after the 16th hundred years and by the later 19th hundred years were an important commercial crop centred mainly on holland. Today narcissi are popular as slice bouquets so that as ornamental plants in private and public gardens. The long history of breeding has led to a large number of different cultivars. For horticultural purposes, narcissi are grouped into divisions, covering a variety of colours and shapes. Like other members of their family, narcissi create a true number of different alkaloids, which provide some protection for the plant, but may be poisonous if ingested unintentionally. This property has been exploited for medicinal use within traditional healing and has led to the production of galantamine for the treatment of Alzheimer's dementia. Long celebrated in art and literature, narcissi are associated with a number of themes in different cultures, ranging from fatality to fortune, and as icons of springtime. The daffodil is the nationwide rose of Wales and the icon of cancer tumor charities in many countries. The looks of the outdoors flowers in planting season is associated with festivals in many places.
Narcissus is a genus of perennial herbaceous bulbiferous geophytes, dying back again after flowering to the underground storage light bulb. They regrow in the next year from brown-skinned ovoid light bulbs with pronounced necks, and reach levels of 5-80 cm with regards to the species. Dwarf kinds such as N. asturiensis have a maximum elevation of 5-8 cm, while Narcissus tazetta might grow as extra tall as 80 cm.
The plants are scapose, having an individual central leafless hollow rose stem (scape). Several green or blue-green, small, strap-shaped leaves happen from the light. The plant stem usually bears a solitary flower, but occasionally a cluster of flowers (umbel). The blooms, that are usually conspicuous and white or yellow, both or almost never renewable sometimes, consist of a perianth of three parts. Closest to the stem (proximal) is a floral tube above the ovary, then an external ring made up of six tepals (undifferentiated sepals and petals), and a central disk to conical formed corona. The flowers may hang up down (pendent), or be erect. You will find six pollen bearing stamens adjoining a central style. The ovary is substandard (below the floral parts) comprising three chambers (trilocular). The berries includes a dried capsule that splits (dehisces) releasing numerous black seeds.
The bulb lays dormant after the leaves and bloom stem die back and has contractile root base that pull it down further into the soil. The blossom stem and leaves form in the light, to emerge the following season. Most varieties are dormant from summer time to past due winter, flowering in the spring, though a few varieties are autumn flowering.
Tidak ada komentar:
Posting Komentar