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Petrosaviaceae
Petrosaviaceae is a family of flowering plants. Such a family has been recognized by only few taxonomists: the plants involved were usually treated as belonging to the family Liliaceae.
The APG II system, of 2003, does recognize this family and assigns it to the clade monocots, unplaced as to order. This family then consists of two genera ''Japonolirion'' and ''Petrosavia''. In circumscribing the family in this way, APG II departs from the APG system, of 1998, which treated each of these genera as constituting its own family. The APG III system, of 2009, place family Petrosaviaceae in order Petrosaviales.〔
''Japonolirion'' is taken to consist of one species and ''Petrosavia'' of three species. The plants in both genera are found in high-elevation habitats and have bracteate racemes, pedicellate flowers, six persistent tepals, septal nectaries, three nearly distinct carpels, simultaneous microsporogenesis, monosulcate pollen, and follicular fruits.
== References ==
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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