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dogbane

dogbane common name for some members of the Apocynaceae, a family of herbs, shrubs, and trees found in most parts of the world but especially in the tropics, where they are often climbing forms. Many species are native to or naturalized in North America. Members of the family are sources of such economically important products as drugs and tannins. The vincristine alkaloids that are so effective in the treatment of Hodgkin's disease were discovered in the Madagascar periwinkle, Catharanthus roseus. Quebracho is obtained from Aspidosperma quebracho blanco, the white quebracho; latex for rubber was extracted from some tropical genera, e.g., Landolphia; and fiber, e.g., Indian hemp, is retted from north temperate species of Apocynum, the dogbane genus (not to be confused with the Indian hemp plant, Cannabis ). Some dogbanes are ornamentals, e.g., the shrubby oleanders, or rosebays (genus Nerium ), the yellow oleander ( Thevetia neriifolia ), and the small blue-flowered periwinkles, or running myrtle (chiefly Vinca minor ), all of which are evergreen plants native to the Old World. The dogbane family is closely related and similar to the milkweed family; both have a characteristic milky sap. Some dogbanes are poisonous, e.g., the oleanders and the ordeal tree ( Tanghinia venenifera ) of Madagascar. Dogbane is classified in the division Magnoliophyta , class Magnoliopsida, order Gentianales.

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	oleander Book article from: The Oxford Pocket Dictionary of Current English o·le·an·der / ˈōlēˌandər / • n. a poisonous evergreen Old World shrub ( Nerium oleander ) of the dogbane family that is widely grown in warm countries for its clusters of white, pink, or red flowers. Read more
	periwinkle Book article from: The Columbia Encyclopedia, Sixth Edition in botany: see dogbane . Read more
	reserpine Book article from: The Columbia Encyclopedia, Sixth Edition , alkaloid isolated from the root of the snakeroot plant ( Rauwolfia serpentina ), a small evergreen climbing shrub of the dogbane family native to the Indian subcontinent. Known in India as Sarpaganda, it was used for centuries to treat insanity as well... Read more
	Periwinkle Encyclopedia entry from: Gale Encyclopedia of Alternative Medicine ...name for a pair of perennial flowering shrubs belonging to the dogbane (Apocynaceae) family. The herb has been used for centuries...name in some of the herbal literature. Another member of the dogbane family, this plant originated on the island of Madagascar but... Read more
	quebracho Book article from: The Columbia Encyclopedia, Sixth Edition ...the forests of the Gran Chaco of Argentina, Paraguay, and Bolivia. White quebracho ( Aspidosperma quebracho-blanco ) of the dogbane family is one of the other hardwoods similarly used and is native to the same region. Red quebracho is classified in the division... Read more

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