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Helleborus niger : ウィキペディア英語版 | Helleborus niger
''Helleborus niger'', commonly called Christmas rose or black hellebore, is an evergreen perennial flowering plant in the buttercup family, Ranunculaceae. It is poisonous. Although the flowers resemble wild roses (and despite its common name), Christmas rose does not belong to the rose family (Rosaceae). ==Description==
''Helleborus niger'' is an evergreen plant with dark leathery pedate leaves carried on stems 9–12 in (23–30 cm) tall. The large flat flowers, borne on short stems from midwinter to early spring, are white or occasionally pink.〔Rice, Graham & Strangman, Elizabeth, ''The Gardener's Guide to Growing Hellebores'', David & Charles/Timber Press (1993) ISBN 0-7153-9973-X〕 There are two subspecies: ''H. niger niger'' as well as ''H. niger macranthus'', which has larger flowers (up to 3.75 in/9 cm across). In the wild, ''H. niger niger'' is generally found in mountainous areas in Switzerland, southern Germany, Austria, Slovenia, Croatia and northern Italy. ''Helleborus niger macranthus'' is found only in northern Italy and possibly adjoining parts of Slovenia.〔
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