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Rehmannia
''Rehmannia'' is a genus of six species of flowering plants in the order Lamiales, endemic to China.
The genus was included in the family Scrophulariaceae or Gesneriaceae in some older classifications. The current placement of the genus is in neither Scrophulariaceae s.s. nor Plantaginaceae s.l. (to which many other former Scrophulariaceae have been transferred). Earlier molecular studies suggested that its closest relatives were the genera ''Lancea'' and ''Mazus'' (Oxelman et al., 2005), which have been included in Phrymaceae (Beardsley & Olmstead, 2002). Subsequently it was found (Xie ''et al.'', 2009) that ''Rehmannia'' and ''Triaenophora'' are jointly the sister group to ''Lindenbergia'' and the parasitic Orobanchaceae.
==Uses==
Sometimes known as Chinese Foxglove due to its superficial resemblance to the genus ''Digitalis'', the species of ''Rehmannia'' are perennial herbs. The plants have large flowers and are grown as ornamental garden plants in Europe and North America, and are used medicinally in Asia.
Known as dìhuáng (地黄) or gān dìhuáng (干地黄) in Chinese, ''R. glutinosa'' is used as a medicinal herb for arthritic conditions within Chinese traditional formulations.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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