The genus was previously placed in the tribe Millettieae. Īs the spelling is apparently deliberate, there is no justification for changing the genus name under the International Code of Nomenclature for algae, fungi, and plants. It has been suggested that the Portuguese botanist and geologist José Francisco Corrêa da Serra, who lived in Philadelphia beginning in 1812, four years before his appointment as ambassador of Portugal to the United States, and a friend of Wistar, proposed the name "Wistaria" in his obituary of Wistar. Various sources assert that the naming occurred in Philadelphia. Questioned about the spelling later, Nuttall said it was for " euphony", but his biographer speculated that it may have something to do with Nuttall's friend Charles Jones Wister Sr., of Grumblethorpe, the grandson of the merchant John Wister. Both men were living in Philadelphia at the time, where Wistar was a professor in the School of Medicine at the University of Pennsylvania. Nuttall stated that he named the genus in memory of the American physician and anatomist Caspar Wistar (1761–1818). He based the genus on Wisteria frutescens, previously included in the genus Glycine. The genus Wisteria was established by Thomas Nuttall in 1818. Flowering is in spring (just before or as the leaves open) in some Asian species, and in mid to late summer in the American species. sinensis are noted for their sweet and musky scents. The flowers are fragrant, and especially cultivars of W. floribunda cultivars have particularly remarkable colors. The flowers come in a variety of colors, including white, lilac, purple, and pink, and some W. floribunda (Japanese wisteria) has the longest racemes, 90 centimetres (35 in) in some varieties and 120 centimetres (47 in) or 200 centimetres (79 in) in some cultivars. frutescens (American wisteria) has the shortest racemes, 5–7 centimetres (2.0–2.8 in). The flowers have drooping racemes that vary in length from species to species. The leaves are alternate, 15 to 35 cm long, pinnate, with 9 to 19 leaflets. Planted in 1894, it is of the 'Chinese lavender' variety. The world's largest known wisteria is the Sierra Madre Wisteria in Sierra Madre, California, measuring more than 1 acre (0.40 ha) in size and weighing 250 tons. They can climb as high as 20 m (66 ft) above the ground and spread out 10 m (33 ft) laterally. This is an aid in identifying the two most common species of wisteria. sinensis (Chinese wisteria) twines counterclockwise. floribunda (Japanese wisteria) twines clockwise when viewed from above, while W. Wisterias climb by twining their stems around any available support. The seeds of all Wisteria species contain high levels of the wisterin toxin and are especially poisonous. The aquatic flowering plant commonly called wisteria or 'water wisteria' is Hygrophila difformis, in the family Acanthaceae.ĭescription Seeds and seedpods of Wisteria floribunda (Japanese wisteria). Examples include the French glycines, the German Glyzinie, and the Polish glicynia. In some countries in Western and Central Europe, Wisteria is also known by a variant spelling of the genus in which species were formerly placed, Glycine. The genus name is also used as the English name, and may then be spelt 'wistaria'. Some species are popular ornamental plants. They were later introduced to France, Germany and various other countries in Europe. The genus includes four species of woody twining vines that are native to China, Japan, Korea, Vietnam, southern Canada, the Eastern United States, and north of Iran. Wisteria is a genus of flowering plants in the legume family, Fabaceae (Leguminosae). For other uses, see Wistaria (disambiguation).
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