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Xanthorrhoeaceae is a family of flowering plants in the order Asparagales.〔"Xanthorrhoeaceae" In: Peter F. Stevens (2001 onwards). Angiosperm Phylogeny Website. In: Missouri Botanical Garden Website. (see external links below)〕 Such a family has been recognized by most taxonomists, but the circumscription of the family has varied widely.〔Ole Seberg. 2007. "Xanthorrhoeaceae pages 406-407. In: Vernon H. Heywood, Richard K. Brummitt, Ole Seberg, and Alastair Culham. ''Flowering Plant Families of the World''. Firefly Books: Ontario, Canada.〕 As defined by the Angiosperm Phylogeny Group in 2009 (the APG III system), the family consists of three subfamilies: Asphodeloideae, Hemerocallidoideae and Xanthorrhoeoideae. Earlier these three had been treated as separate families, with the Xanthorrhoeaceae ''sensu stricto'' consisting only of the genus ''Xanthorrhoea''. The family has a wide, but scattered distribution throughout the tropics and temperate zones. Many of the species are cultivated as ornamentals. A few are grown commercially for cut flowers. Two species of ''Aloe'' are grown for their leaf sap, which has medicinal and cosmetic uses. ''Xanthorrhoea'' is endemic to Australia. In some of the older systems of plant taxonomy, such as the Cronquist system, the plants that now form the family Dasypogonaceae were also considered to belong to this family. Molecular phylogenetic studies have shown that Dasypogonaceae belongs to the commelinids and is therefore not even in the same order as Xanthorrhoeaceae. ==Description== Members of the Xanthorrhoeaceae are diverse, with few characters uniting the three subfamilies currently recognized. The presence of anthraquinones is one common character. The flowers (the inflorescence) are typically borne on a leafless stalk (scape) which arises from a basal rosette of leaves. The individual flowers have jointed stalks (pedicels). A disk of woody tissue (a hypostase) is present at the base of the ovule.〔 The subfamily Xanthorrhoeoideae contains only the genus ''Xanthorrhoea'', native to Australia. Plants typically develop thick woody stems; the flowers are arranged in a dense spike. Members of the subfamily Asphodeloideae are often leaf succulents, such as aloes and haworthias, although the subfamily also includes ornamental perennials such as red hot pokers (''Kniphofia''). Members of the subfamily Hemerocallidoideae are varied in habit. Daylilies (''Hemerocallis'') are one of the widely grown members of this subfamily.〔 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「Xanthorrhoeaceae」の詳細全文を読む スポンサード リンク
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