Chelidonium majus, (commonly known as greater celandine, nipplewort, swallowwort, or tetterwort, which also refers to Sanguinaria canadensis) is a herbaceous perennial plant, one of two species in the genus Chelidonium. It is native to Europe and western Asia and introduced widely in North America.
Greater celandine is a perennial herb with an erect habit, and reaches 30–120 cm (12–47 in) high. The blue-grey leaves are pinnate (feather-like) with lobed and wavy margins, up to 30 cm (12 in) long. When injured, the plant exudes a yellow to orange latex, or sap.
The flowers consist of four yellow petals, each about 18 mm (0.71 in) long, with two sepals. A double-flowered variety occurs naturally. The flowers appear from late spring to summer, May to September (in UK), in umbelliform cymes of about 4 flowers.
Taxonomy and naming
The greater celandine is one of the many species described by the father of taxonomy, Carl Linnaeus, in volume one of his Species Plantarum in 1753. According to the Oxford English Dictionary, celandine comes from Late Latin celidonia, from earlier Latin chelidonia or chelidonium, and ultimately from Ancient Greek χελιδόνιον, from χελιδών (chelidṓn) "swallow". Ancient writers said that the flower bloomed when the swallows returned and faded when they left.
Distribution and habitat
Chelidonium majus grows in most regions of Europe. It is also found in North Africa: Macaronesia, Algeria and Morocco. In Western Asia it is found in the Caucasus, Armenia, Azerbaijan, Georgia, Kazakhstan, Mongolia, Siberia, Iran and Turkey.
It is considered an aggressive invasive plant in parts of North America, and an invasive plant in other areas. In Wisconsin, for example, it is a restricted plant. Control is obtained mainly via pulling or spraying the plant before seed dispersal.
The whole plant is toxic in moderate doses as it contains a range of isoquinoline alkaloids; use in herbal medicine requires the correct dose. The main alkaloid present in the herb and root is coptisine. Other alkaloids present include methyl 2'-(7,8-dihydrosanguinarine-8-yl)acetate, allocryptopine, stylopine, protopine, norchelidonine, berberine, chelidonine, sanguinarine, chelerythrine, and 8-hydroxydihydrosanguinarine. Sanguinarine is particularly toxic with an LD50 of 18 mg per kg body weight (IP in rats). Caffeic acid derivatives, such as caffeoylmalic acid, are also present.
The aerial parts and roots of greater celandine are used in herbalism. The above-ground parts are gathered during the flowering season and dried at high temperatures. The root is harvested in autumn between August and October and dried. The fresh rhizome is also used. Celandine has a hot and bitter taste. Preparations are made from alcoholic and hot aqueous extractions (tea). The related plant bloodroot has similar chemical composition and uses as greater celandine.
As far back as Pliny the Elder and Dioscorides (1st century CE) this herb has been recognized as a useful detoxifying agent. The root has been chewed to relieve toothache. John Gerard's Herball (1597) states that "the juice of the herbe is good to sharpen the sight, for it cleanseth and consumeth away slimie things that cleave about the ball of the eye and hinder the sight and especially being boiled with honey in a brasen vessell."
It was formerly used by some Romani people as a foot refresher; modern herbalists use its purgative properties. The modern herbalist Juliette de Baïracli Levy recommended greater celandine diluted with milk for the eyes and the latex for getting rid of warts. Chelidonium was a favourite herb of the French herbalist Maurice Mességué. Chelidonium majus has traditionally been used for treatment of various inflammatory diseases including atopic dermatitis. It is also traditionally used in the treatment of gallstones and dyspepsia.
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