narcissus yellow stripe virus and others plants affected narcissus

Narcissus /n?:r's?s?s/ is a genus of mostly spring perennial plants in the Amaryllidaceae (amaryllis) family. Various common brands including daffodil,[notes 1] daffadowndilly,[3] narcissus, and jonquil are being used to describe all or some known members of the genus. Narcissus has conspicuous flowers with six petal-like tepals surmounted with a cup- or trumpet-shaped corona. The blooms are generally white or yellowish (orange or pink in garden types), with either uniform or contrasting coloured tepals and corona.

Narcissus were well known in old civilisation, both and botanically medicinally, but formally referred to by Linnaeus in his Species Plantarum (1753). The genus is normally considered to have about ten parts with approximately 50 species. The true variety of species has mixed, depending about how they are classified, thanks to similarity between hybridization and species. The genus arose a while in the Late Oligocene to Early Miocene epochs, in the Iberian peninsula and adjacent areas of southwest Europe. The precise origin of the real name Narcissus is anonymous, but it is linked to a Greek term for intoxicated (narcotic) and the misconception of the young ones of that name who fell deeply in love with his own representation. The English expression 'daffodil' appears to be derived from "asphodel", with which it was commonly likened.

The varieties are native to meadows and woods in southern Europe and North Africa with a centre of variety in the American Mediterranean, particularly the Iberian peninsula. Both wild and cultivated plants have naturalised widely, and were launched in to the Far East to the tenth hundred years prior. 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, mites and nematodes. Some Narcissus species have become extinct, while others are threatened by increasing tourism and urbanisation.

Historical accounts suggest narcissi have been cultivated from the initial times, but became ever more popular in Europe after the 16th century and by the later 19th century were an important commercial crop centred mainly on the Netherlands. Today narcissi are popular as slice blooms and since ornamental plant life in private and open public gardens. The long history of breeding has resulted in thousands of different cultivars. For horticultural purposes, narcissi are categorized into divisions, covering an array of shapes and colours. Like other members with their family, narcissi create 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 used in traditional healing and has led to the production of galantamine for the treatment of Alzheimer's dementia. Long celebrated in books and skill, narcissi are associated with a true number of themes in different cultures, ranging from death to good fortune, and as icons of spring and coil. The daffodil is the countrywide bloom of Wales and the symbol of cancer charities in many countries. The looks of the outdoors flowers in springtime is associated with festivals in many places.

Narcissus is a genus of perennial herbaceous bulbiferous geophytes, dying back again after flowering with an underground storage light. They regrow in the following yr from brown-skinned ovoid 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 increase as tall as 80 cm.

The plant life are scapose, having an individual central leafless hollow flower stem (scape). Several green or blue-green, narrow, strap-shaped leaves arise from the light. The place stem bears a solitary bloom, but sometimes a cluster of flowers (umbel). The flowers, which can be usually conspicuous and white or yellow, both or seldom renewable sometimes, consist of a perianth of three parts. Closest to the stem (proximal) is a floral tube above the ovary, then an exterior ring made up of six tepals (undifferentiated sepals and petals), and a central disc to conical designed corona. The blossoms may suspend down (pendent), or be erect. You can find six pollen bearing stamens adjoining a central style. The ovary is substandard (below the floral parts) comprising three chambers (trilocular). The fruit involves a dried out capsule that splits (dehisces) launching numerous black seed products.

The bulb is situated dormant after the leaves and bloom stem die back again and has contractile origins that pull it down further in to the soil. The blossom stem and leaves form in the light bulb, to emerge the next season. Most types are dormant from summertime to late winter, flowering in the springtime, though a few varieties are autumn flowering.

Narcissus Pictures

Narcissus MeetingDouble daffodil_植物图片库_植物通

Narcissus Wikibooks, open books for an open world

Narcissus Fine Gardening

Narcissus ‘Snipe’ planted with Sedum, near the Base of the Secret