|Cultivated tulip – Floriade 2005, Canberra|
The tulip is a perennial, bulbous plant with showy flowers in the genus Tulipa, of which around 75 wild species are currently accepted and which belongs to the family Liliaceae. The genus's native range extends west to the Iberian Peninsula, through North Africa to Greece, the Balkans, Turkey, throughout the Levant (Syria, Israel, Lebanon, Jordan) and Iran, North to Ukraine, southern Siberia and Mongolia, and east to the Northwest of China. The tulip's centre of diversity is in the Pamir, Hindu Kush, and Tien Shan mountains. It is a typical element of steppe and winter-rain Mediterranean vegetation. A number of species and many hybrid cultivars are grown in gardens, as potted plants, or as cut flowers.
Tulips are spring-blooming perennials that grow from bulbs. Depending on the species, tulip plants are between 4 inches (10 cm) and 28 inches (71 cm) high. The tulip's large flowers usually bloom on scapes with leaves in a rosette at ground level and a single flowering stalk arising from amongst the leaves.Tulip stems have few leaves. Larger species tend to have multiple leaves. Plants typically have two to six leaves, some species up to 12. The tulip's leaf is strap-shaped, with a waxy coating, and the leaves are alternately arranged on the stem; these fleshy blades are often bluish green in color. Most tulips produce only one flower per stem, but a few species bear multiple flowers on their scapes (e.g. Tulipa turkestanica). The generally cup or star-shaped tulip flower has three petals and three sepals, which are often termed tepals because they are nearly identical. These six tepals are often marked on the interior surface near the bases with darker colorings. Tulip flowers come in a wide variety of colors, except pure blue (several tulips with "blue" in the name have a faint violet hue).
The flowers have six distinct, basifixed stamens with filaments shorter than the tepals. Each stigma has three distinct lobes, and the ovaries are superior, with three chambers. The tulip's seed is a capsule with a leathery covering and an ellipsoid to globe shape. Each capsule contains numerous flat, disc-shaped seeds in two rows per chamber. These light to dark brown seeds have very thin seed coats and endosperm that does not normally fill the entire seed.
The word tulip, first mentioned in western Europe in or around 1554 and seemingly derived from the "Turkish Letters" of diplomat Ogier Ghiselin de Busbecq, first appeared in English as tulipa or tulipant, entering the language by way of French: tulipe and its obsolete form tulipan or by way of Modern Latin tulīpa, from Ottoman Turkish tülbend ("muslin" or "gauze"), and may be ultimately derived from the Persian: دلبند delband ("Turban"), this name being applied because of a perceived resemblance of the shape of a tulip flower to that of a turban. This may have been due to a translation error in early times, when it was fashionable in the Ottoman Empire to wear tulips on turbans. The translator possibly confused the flower for the turban.
Tulips are called lale (from Persian لاله, lâleh) in Farsi, Turkish, Arabic, and Bulgarian. In Arabic letters, lale is written with the same letters as Allah, which is why the flower became a holy symbol. It was also associated with the House of Osman, resulting in tulips being widely used in decorative motifs on tiles, mosques, fabrics, crockery, etc. in the Ottoman Empire
Tulip cultivars have usually several species in their direct background, but most have been derived from Tulipa suaveolens, often erroneously listed as Tulipa schrenkii. Tulipa gesneriana is in itself an early hybrid of complex origin and is probably not the same taxon as was described by Conrad Gesner in the 16th century.
Tulips are indigenous to mountainous areas with temperate climates and need a period of cool dormancy, known as vernalization. They thrive in climates with long, cool springs and dry summers. Tulip bulbs imported to warm-winter areas of are often planted in autumn to be treated as annuals.
Tulip bulbs are typically planted around late summer and fall, in well-drained soils, normally from 4 to 8 inches (10 to 20 cm) deep, depending on the type. Species tulips are normally planted deeper.
Tulips can be propagated through bulb offsets, seeds or micropropagation. Offsets and tissue culture methods are means of asexual propagation for producing genetic clones of the parent plant, which maintains cultivar genetic integrity. Seeds are most often used to propagate species and subspecies or to create new hybrids. Many tulip species can cross-pollinate with each other, and when wild tulip populations overlap geographically with other tulip species or subspecies, they often hybridize and create mixed populations. Most commercial tulip cultivars are complex hybrids, and often sterile.
Offsets require a year or more of growth before plants are large enough to flower. Tulips grown from seeds often need five to eight years before plants are of flowering size. Commercial growers usually harvest the tulip bulbs in late summer and grade them into sizes; bulbs large enough to flower are sorted and sold, while smaller bulbs are sorted into sizes and replanted for sale in the future. The Netherlands are the world's main producer of commercial tulip plants, producing as many as 3 billion bulbs annually, the majority for export.
Cultivation of the tulip began in Persia, probably in the 10th century. Early cultivars must have emerged from hybridisation in gardens from wild collected plants, which were then favoured, possibly due to flower size or growth vigour. During the Ottoman Empire, numerous tulips were cultivated and bred. In 1574, Sultan Selim II. ordered the Kadi of A‘azāz, in Syria to send him 50.000 tulip bulbs. However, Harvey points out several problems with this source, and there is also the possibility that tulips and hyacinth (sümbüll, originally Indian spikenard (Nardostachys jatamansi) have been confused. Sultan Selim also imported 300.000 bulbs of Kefe Lale (also known as Cafe-Lale, from the medieval name Kaffa, probably Tulipa schrenkii) from Kefe for his gardens in the Topkapı Sarayı in Istanbul. Sultan Ahmet III maintained famous tulip gardens in the summer highland pastures (Yayla) at Spil Dağı above the town of Manisa. They seem to have consisted of wild tulips. However, from the 14 tulip species known from Turkey, only four are considered to be of local origin, so wild tulips from Iran and Central Asia may have been brought into Turkey during the Seljuk and especially Ottoman periods. Sultan Ahmet also imported domestic tulip bulbs from the Netherlands.
The gardening book Revnak'ı Bostan (Beauty of the Garden) by Sahibül Reis ülhaç Ibrahim Ibn ülhaç Mehmet, written in 1660 does not mention the tulip at all, but contains advice on growing hyacinths and lilies. However, there is considerable confusion of terminology, and tulips may have been subsumed under hyacinth, a mistake several European botanists were to perpetuate. In 1515, the scholar Qasim from Herat in contrast had identified both wild and garden tulips (lale) as anemones (shaqayq al-nu'man), but described the crown imperial as laleh kakli.
In a Turkic text written before 1495, the Chagatay Husayn Bayqarah mentions tulips (lale). Babur, the founder of the Mughal Empire, also names tulips in the Baburnama. He may actually have introduced them from Afghanistan to the plains of India, as he did with other plants like melons and grapes.
In Moorish Andalus, a "Makedonian bulb" (basal al-maqdunis) or "bucket-Narcissus" (naryis qadusi) was cultivated as an ornamental plant in gardens. It was supposed to have come from Alexandria and may have been Tulipa sylvestris, but the identification is not wholly secure.
Although it is unknown who first brought the tulip to Northwestern Europe, the most widely accepted story is that it was Oghier Ghislain de Busbecq, an ambassador for Emperor Ferdinand I to Suleyman the Magnificent. According to a letter, he saw "an abundance of flowers everywhere; Narcissus, hyacinths and those in Turkish called Lale, much to our astonishment because it was almost midwinter, a season unfriendly to flowers." However, in 1559, an account by Conrad Gessner describes tulips flowering in Augsburg, Swabia in the garden of Councillor Heinrich Herwart. In Central and Northern Europe, Tulip bulbs are generally removed from the ground in June and must be replanted by September for the winter. It is doubtful that Busbecq could have had the tulip bulbs harvested, shipped to Germany and replanted between March 1558 and Gessner's description the following year. Pietro Andrea Mattioli illustrated a tulip in 1565 but identified it as a narcissus, however.
Carolus Clusius planted tulips at the Vienna Imperial Botanical Gardens in 1573. After he was appointed director of the Leiden University's newly established Hortus Botanicus, he planted some of his tulip bulbs here in late 1593. Thus, 1594 is considered the date of the tulip's first flowering in the Netherlands, despite reports of the cultivation of tulips in private gardens in Antwerp and Amsterdam two or three decades earlier. These tulips at Leiden would eventually lead to both the Tulip mania and the tulip industry in the Netherlands.
Carolus Clusius is largely responsible for the spread of tulip bulbs in the final years of the sixteenth century. He finished the first major work on tulips in 1592, and made note of the variations in colour. While a faculty member in the school of medicine at the University of Leiden, Clusius planted both a teaching garden and his private garden with tulips. In 1596 and 1598, over a hundred bulbs were stolen from his garden in a single raid.
Between 1634 and 1637, the enthusiasm for the new flowers triggered a speculative frenzy now known as the tulip mania. Tulip bulbs became so expensive that they were treated as a form of currency, or rather, as futures. Around this time, the ceramic tulipiere was devised for the display of cut flowers stem by stem. Vases and bouquets, usually including tulips, often appeared in Dutch still-life painting). To this day, tulips are associated with the Netherlands, and the cultivated forms of the tulip are often called "Dutch tulips." The Netherlands have the world's largest permanent display of tulips at the Keukenhof.
It is believed the first tulips in the United States were grown near Spring Pond at the Fay Estate in Lynn and Salem, Massachusetts. From 1847 to 1865, Richard Sullivan Fay, Esq., one of Lynn's wealthiest men, settled on 500 acres (2.0 km2) located partly in present-day Lynn and partly in present-day Salem. Mr. Fay imported many different trees and plants from all parts of the world and planted them among the meadows of the Fay Estate.
Botrytis tulipae is a major fungal disease affecting tulips, causing cell death and eventually the rotting of the plant. Other pathogens include anthracnose, bacterial soft rot, blight caused by Sclerotium rolfsii, bulb nematodes, other rots including blue molds, black molds and mushy rot.
Variegated tulips admired during the Dutch tulipomania gained their delicately feathered patterns from an infection with the tulip breaking virus, a mosaic virus that was carried by the green peach aphid, Myzus persicae. While the virus produces fantastically streaked flowers, it also weakens plants and reduces the number of offsets produced. Tulips affected by mosaic virus are called "broken"; while such plants can occasionally revert to a plain or solid colouring, they will remain infected and have to be destroyed. Today the virus is almost eradicated from tulip growers' fields. The multicoloured patterns or modern varieties result from breeding, they normally have solid, not feathered borders between the colours.
The tulip was a topic for Persian poets from the thirteenth century. In the poem Gulistan by Musharrifu'd-din Saadi, described a visionary garden paradise with 'The murmur of a cool stream / bird song, ripe fruit in plenty / bright multicoloured tulips and fragrant roses...' The gift of a red or yellow tulip was a declaration of love, the flower's black center representing a heart burned by passion. In recent times, tulips have featured in the poems of Simin Behbahani. During the Ottoman Empire, the tulip was seen as a symbol of abundance and indulgence. The era during which the Ottoman Empire was wealthiest is often called the Tulip era or Lale Devri in Turkish.
Tulips became popular garden plants in east and west, but, whereas the tulip in Turkish culture was a symbol of paradise on earth and had almost a divine status, in the Netherlands it represented the briefness of life.
The Black Tulip is a historical romance by Alexandre Dumas, père. The story takes place in the Dutch city of Haarlem, where a reward is offered to the first grower who can produce a truly black tulip.
The Tulip is also viewed prominently in a number of the Major Arcana cards of the Oswald Wirth Tarot deck. Specifically: Arcanas Zero,One, Four, and Fifteen.
Today, Tulip festivals are held around the world, for example in the Netherlands and Spalding, England. There is also a popular festival in Morges, Switzerland. Every spring, there are tulip festivals in North America, including the Tulip Time Festival in Holland, Michigan, the Skagit Valley Tulip Festival in Skagit Valley, Washington, the Tulip Time Festival in Orange City and Pella, Iowa, and the Canadian Tulip Festival in Ottawa, Canada. Tulips are also popular in Australia and several festivals are held in September and October, during the Southern Hemisphere's spring.
In 1997 the two sections were raised to subgenera and subgenus Tulipa was divided into five sections:
Subgenus Eriostemones was divided into the sections:
In 2009, two other subgenera were proposed, Clusianae and Orithyia, and this total of four subgenera was corroborated by a recent study (Christenhusz et al. 2013). That study did not find support for any of the previous sections proposed, and since hybridisation is relatively common, it is probably better to refrain from subdividing the subgenera any further. Some species formerly classified as Tulipa are now considered as the separate genus Amana, including Amana edulis (Tulipa edulis). These species are more closely allied to Erythronium.
They may also be classified by their flowering season:
A number of names are based on naturalised garden tulips, and are usually referred to as neo-tulipae. These are often difficult to trace back to their original cultivar, and in some cases have been occurring in the wild for many centuries. The history of naturalisation is unknown, but populations are usually associated with agricultural practices and are possibly linked to saffron cultivation[clarification needed] . Some neo-tulipae have been brought into cultivation, and are often offered as botanical tulips. These cultivated plants can be classified into two Cultivar Groups: 'Grengiolensis Group', with picotee tepals, and the 'Didieri Group' with unicolourous tepals.
Christenhusz classification showing all four subgenera
This list was used as the basis for The Genus Tulipa. Tulips of the World (D. Everett, 2013, Kew Publishing).
Note: The horned tulip, often offered in the trade as Tulipa acuminata is in fact a cultivar, unknown from the wild, and should be distributed under its correct cultivar name: Tulipa ‘Cornuta’.
Tulipanin is an anthocyanin found in tulips. It is the 3-rutinoside of delphinidin. The chemical compounds named tuliposides and tulipalins can also be found in tulips and are responsible for allergies. Tulipalin A, or α-methylene-γ-butyrolactone, is a common allergen, generated by hydrolysis of the glucoside tuliposide A. It induces a dermatitis that is mostly occupational and affects tulip bulb sorters and florists who cut the stems and leaves. Tulipanin A and B are toxic to horses, cats and dogs.
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