This article is largely based on an article in the out-of-copyright Encyclopædia Britannica Eleventh Edition, which was produced in 1911. It should be brought up to date to reflect subsequent history or scholarship (including the references, if any). When you have completed the review, replace this notice with a simple note on this article's talk page.(August 2017)
Chemical structure of scammonin I, one of the primary chemical constituents of jalap
Jalap has been known in Europe since the beginning of the 17th century, and derives its name from the city of Xalapa in Mexico, near which it grows, but its botanical source was not accurately determined until 1829, when Dr. J. R. Coxe of Philadelphia published a description.[1]
The ordinary drug is distinguished in commerce as Vera Cruz jalap, from the name of the port whence it is shipped. Jalap has been cultivated for many years in India, chiefly at Ootacamund, and grows there as easily as a yam, often producing clusters of tubers weighing over 9 lb; but these, as they differ in appearance from the commercial article, have not as yet obtained a place in the English market. They are found, however, to be rich in resin, containing 18%. The plant also has been grown in Jamaica, at first amongst the cinchona trees, but more recently in new ground, as it was found to exhaust the soil. Besides Mexican or Vera Cruz jalap, a drug called Tampico jalap has been imported for some years in considerable quantity. It has a much more shrivelled appearance and paler colour than ordinary jalap, and lacks the small, transverse scars present in the true drug. This kind of jalap, the purga de Sierra Gorda of the Mexicans, was traced by Daniel Hanbury to Ipomoea simulans.[1]
Ipomoea jalapa is yet another morning gloryspecies from which jalap is obtained; it was first scientifically described (as Convolvulus jalapa) by Linnaeus. However, it is not of great commercial importance. As it also occurs in Veracruz, it was long confused with I. purga, even by such eminent botanists as David Don, Thomas Nuttall or C.J.W. Schiede. Consequently, the name I. jalapa is often seen as an invalid junior homonym referring to I. purga, in particular in sources older than 1989 (when the confusion was finally resolved). Throughout much of the 20th century, the I. jalapa of Linnaeus was called I. carrizalia.
^ abcOne or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Jalap". Encyclopædia Britannica. Vol. 15 (11th ed.). Cambridge University Press. pp. 130–131.
jalap, this, article, largely, based, article, copyright, encyclopædia, britannica, eleventh, edition, which, produced, 1911, should, brought, date, reflect, subsequent, history, scholarship, including, references, when, have, completed, review, replace, this,. This article is largely based on an article in the out of copyright Encyclopaedia Britannica Eleventh Edition which was produced in 1911 It should be brought up to date to reflect subsequent history or scholarship including the references if any When you have completed the review replace this notice with a simple note on this article s talk page August 2017 Jalap is a cathartic drug largely obsolete in Western medicine consisting of the tuberous roots of Ipomoea purga a convolvulaceous plant growing on the eastern declivities of the Sierra Madre Oriental of Mexico at an elevation of 5 000 to 8 000 feet 1 500 to 2 400 m above sea level more especially about the neighbourhood of Chiconquiaco on the eastern slope of the Cofre de Perote in the state of Veracruz 1 Chemical structure of scammonin I one of the primary chemical constituents of jalap Jalap has been known in Europe since the beginning of the 17th century and derives its name from the city of Xalapa in Mexico near which it grows but its botanical source was not accurately determined until 1829 when Dr J R Coxe of Philadelphia published a description 1 The ordinary drug is distinguished in commerce as Vera Cruz jalap from the name of the port whence it is shipped Jalap has been cultivated for many years in India chiefly at Ootacamund and grows there as easily as a yam often producing clusters of tubers weighing over 9 lb but these as they differ in appearance from the commercial article have not as yet obtained a place in the English market They are found however to be rich in resin containing 18 The plant also has been grown in Jamaica at first amongst the cinchona trees but more recently in new ground as it was found to exhaust the soil Besides Mexican or Vera Cruz jalap a drug called Tampico jalap has been imported for some years in considerable quantity It has a much more shrivelled appearance and paler colour than ordinary jalap and lacks the small transverse scars present in the true drug This kind of jalap the purga de Sierra Gorda of the Mexicans was traced by Daniel Hanbury to Ipomoea simulans 1 Ipomoea jalapa is yet another morning glory species from which jalap is obtained it was first scientifically described as Convolvulus jalapa by Linnaeus However it is not of great commercial importance As it also occurs in Veracruz it was long confused with I purga even by such eminent botanists as David Don Thomas Nuttall or C J W Schiede Consequently the name I jalapa is often seen as an invalid junior homonym referring to I purga in particular in sources older than 1989 when the confusion was finally resolved Throughout much of the 20th century the I jalapa of Linnaeus was called I carrizalia See also editIpomoeaReferences edit a b c nbsp One or more of the preceding sentences incorporates text from a publication now in the public domain Chisholm Hugh ed 1911 Jalap Encyclopaedia Britannica Vol 15 11th ed Cambridge University Press pp 130 131 nbsp This history of medicine article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Jalap amp oldid 1199700237, wikipedia, wiki, book, books, library,
