Tulipa gesneriana, the Didier's tulip<ref>Template:PLANTS</ref> or garden tulip, is a species of plants in the lily family, cultivated as an ornamental in many countries because of its large, showy flowers. This tall, late-blooming species has a single blooming flower and linear or broadly lanceolate leaves. This is a complex hybrided neo-species, and can also be called Tulipa × gesneriana.<ref>Maarten J. M. Christenhusz, Rafaël Govaerts, John C. David, Tony Hall, Katherine Borland, Penelope S. Roberts, Anne Tuomisto, Sven Buerki, Mark W. Chase, Michael F. Fay, Tiptoe through the tulips – cultural history, molecular phylogenetics and classification of Tulipa (Liliaceae). Botanical Journal of the Linnean Society 172, 2013, 312</ref> Most of the cultivars of tulip are derived from Tulipa gesneriana. It has become naturalised in parts of central and southern Europe<ref>Altervista Flora Italiana, Tulipano di von Gesner, Tulipa gesneriana L.</ref> and scattered locations in North America.<ref>Biota of North America Program 2014 county distribution map</ref>
This hybrid is widely believed to have originated in Turkey, from the collections of the sultan of the Ottoman Empire in Istanbul, as is the case with other species of tulips that came into Europe.<ref name=s/> 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.<ref name="Harvey">Template:Cite journal</ref> Sultan Selim also imported 300,000 bulbs of Kefe Lale (also known as Cafe-Lale, from the medieval name Kaffa, probably Tulipa schrenkii) from the port of Kefe in Crimea, for his gardens in the Topkapı Sarayı in Istanbul. They are hybridized with other species present in the collections.<ref>Template:Cite book</ref> Tulipa schrenkii is very narrowly related in Tulipa gesneriana, and sometimes classified in the same species.
When the tulip originally arrived in Europe from the Ottoman Empire, its popularity soared and it quickly became a status symbol for the newly wealthy merchants of the Dutch Golden Age. As a mosaic virus began to infect bulbs, producing rare and spectacular effects in the bloom but weakening and destroying the already limited number of bulbs, a speculative frenzy now known as tulip mania was triggered between 1634 and 1637. Bulbs were exchanged for land, livestock, and houses, and the Dutch created futures markets where contracts to buy bulbs at the end of the season were bought and sold.<ref>Goldgar, Anne, Tulipmania: Money, Honor, and Knowledge in the Dutch Golden Age, University of Chicago Press, p. 322.</ref> A single bulb, the Semper Augustus, fetched 6,000 florins in Haarlem — at that time, a florin could purchase a bushel of wheat.
The flower and bulb can cause dermatitis through the allergen, tuliposide A, even though the bulbs may be consumed with little ill effect. The sweet-scented bisexual flowers appear during April and May. Bulbs are extremely resistant to frost and can tolerate temperatures well below freezing — a period of low temperature is necessary to induce proper growth and flowering, triggered by an increase in sensitivity to the phytohormone auxin.<ref>Rietveld, Patrick L.; Wilkinson, Claire; Franssen, Hanneke M.; Balk, Peter A.; van der Plas, Linus H.W.; Weisbeek, Peter J.; de Boer, A. Douwe, "Low temperature sensing in tulip (Tulipa gesneriana L.) is mediated through an increased response to auxin", Journal of Experimental Botany, v.51, no. 344, March, 2000, p. 587-594.</ref>
The bulbs may be dried and pulverised and added to cereals or flour.