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〕 |subdivision_ranks = Genera |subdivision = ''Smilax'' ''Heterosmilax'' |}} Smilacaceae, the greenbrier family, is a family of flowering plants. Up to some decades ago the genera now included in family Smilacaceae were often assigned to a more broadly defined family Liliaceae, but for the past twenty to thirty years most botanists have accepted Smilacaceae as a distinct family. It is considered that the two families evolved around 55 millions years ago during the Early Paleogene possibly near the boundary between Paleocene and Eocene. One characteristic that distinguishes Smilacaceae from most of the other members of the Liliaceae-like Liliales is that it has true vessels in its conducting tissue. Another is that the veins of the leaves, between major veins, are reticulate (net-shaped), rather than parallel as in most monocots.〔(【引用サイトリンク】 Smilacaceae )〕 == Classification == The APG II system, of 2003 (unchanged from the APG system, of 1998), recognizes this family and places it in the order Liliales, in the clade monocots. Within APG II it is a family of probably two genera ''Heterosmilax'' and the larger ''Smilax''. However more recently ''Heterosmilax'' has been found to have arisen from within the ranks for ''Smilax''. The family occurs throughout the tropical and warm temperate regions of the world. Members of this family typically have woody roots and a climbing or vining form. Some have woody vining stems, often with thorns, while others are herbaceous above ground and thornless. Other placements of the family include: * The Cronquist system, of 1981, recognized this family and placed it in order Liliales, in subclass Liliidae in class Liliopsida () of division Magnoliophyta (). * The Reveal system recognized this family and placed it in order Smilacales, in subclass Liliidae which is placed as in the Cronquist system. * The Thorne system (1992) also recognized this family, and placed it in order Dioscoreales in superorder Lilianae in subclass Liliidae () of class Magnoliopsida (). * The Dahlgren system treated it as did the Thorne system (1992): see above. 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「Smilacaceae」の詳細全文を読む スポンサード リンク
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