Xanthorhiza simplicissima (yellowroot) is the only member of the genus Xanthorhiza, and one of very few genera in the family Ranunculaceae with a woody stem (the other notable example being Clematis). It is native to the eastern United States from Maine south to northern Florida and west to Ohio and eastern Texas. It contains the alkaloid berberine, which has a number of traditional and contemporary uses for dyeing and medicine. Yellowroot propagates asexually by sending out many underground runners, and it reproduces sexually with seeds.
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| - Xanthorhiza (fr)
- Xanthorhiza (pt)
- Xanthorhiza (en)
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| - Xanthorhiza é um gênero botânico da família Ranunculaceae. (pt)
- La xanthorhiza (Xanthorhiza simplicissima) est l'unique représentante du genre Xanthorhiza, un des rares genres de la famille des Ranunculaceae possédant une tige lignifiée (l'autre exemple notable étant observé dans le genre Clematis ). C'est une espèce originaire de l'Est des États-Unis dont l'aire de répartition est située entre le sud du Maine au nord de la Floride et à l'Ouest de l'Ohio et dans l'Est du Texas. elle teinte les dents en jaune lorsqu'on croque dans la racine. (fr)
- Xanthorhiza simplicissima (yellowroot) is the only member of the genus Xanthorhiza, and one of very few genera in the family Ranunculaceae with a woody stem (the other notable example being Clematis). It is native to the eastern United States from Maine south to northern Florida and west to Ohio and eastern Texas. It contains the alkaloid berberine, which has a number of traditional and contemporary uses for dyeing and medicine. Yellowroot propagates asexually by sending out many underground runners, and it reproduces sexually with seeds. (en)
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| - Yellowroot flowers in spring (en)
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| - Xanthorhiza apiifolia (en)
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| - La xanthorhiza (Xanthorhiza simplicissima) est l'unique représentante du genre Xanthorhiza, un des rares genres de la famille des Ranunculaceae possédant une tige lignifiée (l'autre exemple notable étant observé dans le genre Clematis ). C'est une espèce originaire de l'Est des États-Unis dont l'aire de répartition est située entre le sud du Maine au nord de la Floride et à l'Ouest de l'Ohio et dans l'Est du Texas. Le nom du genre fait référence à la racine jaune qui était utilisée pour produire une teinture jaune par les Amérindiens. L'épithète spécifique fait allusion à sa racine qui ne présente pas de ramification. Le Xanthorhiza est une plante médicinale. Elle est notamment utilisée depuis des siècles par les Cherokees, en tant qu'antibiotique.On peut infuser la plante pour ensuite boire le breuvage ayant un goût amer. elle teinte les dents en jaune lorsqu'on croque dans la racine. (fr)
- Xanthorhiza simplicissima (yellowroot) is the only member of the genus Xanthorhiza, and one of very few genera in the family Ranunculaceae with a woody stem (the other notable example being Clematis). It is native to the eastern United States from Maine south to northern Florida and west to Ohio and eastern Texas. It contains the alkaloid berberine, which has a number of traditional and contemporary uses for dyeing and medicine. The genus name as well as the common name refer to the plant's yellow roots (xantho- meaning "yellow" and rhiza meaning "root"), which was used to produce a yellow dye by Native Americans. The specific epithet refers to the simple (not branched) stems. In the wild, it grows on the edges of streams in sandy soil under a canopy of dappled sunlight. In cultivation, it is often provided with more sunlight so that the fall colors are more vivid. It is a subshrub, reaching 20–70 centimetres (8–28 in) (rarely 90 centimetres (35 in)) in height, with stems up to 6 millimetres (0.24 in) diameter. The leaves are spirally arranged, 10–18 centimetres (4–7 in) long, each divided into 5 toothed leaflets, and flowers emerge only from the upper portion of the unbranched stem. The flowers are produced in broad panicles 6–20 centimetres (2–8 in) long, each flower small, star-shaped, reddish brown to purple brown, with five petals. Yellowroot propagates asexually by sending out many underground runners, and it reproduces sexually with seeds. Yellowroot is comparatively rare in British gardens, although E.H. Wilson and E.A. Bowles are among distinguished plantsmen to have championed its merits. It was grown by Bowles in his garden at Myddelton House, near Enfield, Middlesex, and gardens that currently cultivate it include the Savill Garden at Windsor, Berkshire and the Westonbirt Arboretum near Tetbury, Gloucestershire. Wilson, who regarded yellowroot as one of the best plants for hardy deciduous ground cover, also described (in 1923) its use in the Arnold Arboretum at Harvard University in Massachusetts. Yellowroot is considered an endangered species in Florida. (en)
- Xanthorhiza é um gênero botânico da família Ranunculaceae. (pt)
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