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''Xylothamia'', the desert goldenrods, is a genus of flowering plants in the daisy family, Asteraceae. Until 2003, it was held to contain nine species of shrubs native to deserts of Mexico and the southwestern United States. However, it seems to contain at least two groups. Four species are related to ''Gundlachia'' and may be moved to that genus. The relationships of the other five species is not quite as clear. All nine species do belong in the subtribe Solidagininae.〔 == Species == The following four species, including the type species ''Xylothamia triantha'', are related to each other and to ''Gundlachia'':〔 *''Xylothamia diffusa'' *''Xylothamia riskindii'' *''Xylothamia triantha'' *''Xylothamia truncata'' The following three species are related to each other and to ''Bigelowia'' and ''Thurovia'':〔 *''Xylothamia pseudobaccharis'' *''Xylothamia parrasana'' *''Xylothamia purpusii'' The following two species are related to each other:〔 *''Xylothamia johnstonii'' *''Xylothamia palmeri'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Xylothamia」の詳細全文を読む スポンサード リンク
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