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Archaefructus
''Archaefructus'' is an extinct genus of herbaceous aquatic seed plants with 3 known species. Fossil material assigned to this genus originates from the Yixian Formation in northeastern China, originally dated as late Jurassic but now thought to be approximately 125 million years old, or early Cretaceous in age. Even with its revised age, ''Archaefructus'' has been proposed to be one of the earliest known genera of flowering plants.
Because of its age, and because it lacks sepals and petals and its reproductive organs, interpreted as carpels and stamens, are produced on an elongate stem rather than condensed into a flower as in modern angiosperms, Archaefructaceae has been proposed as a new basal angiosperm family.〔Sun, G., Q. Ji, D.L. Dilcher, S. Zheng, K.C. Nixon & X. Wang 2002. (Archaefructaceae, a New Basal Angiosperm Family ). ''Science'' 296(5569): 899–904.〕 An alternative interpretation of the same fossil, however, interprets the elongate stem as an inflorescence rather than a flower, with staminate (male) flowers below and pistillate (female) flower above.〔Friis, E.M., J.A. Doyle, P.K. Endress & Q. Leng 2003. ''Archaefructus'' – Angiosperm precursor or specialized early angiosperm? ''Trends in Plant Sciences'' 8: 369–373.〕 The discovery of ''Archaefructus eoflora''〔Ji, Q., H. Li, L.M. Bowe, Y. Liu & D.W. Taylor 2004. ''Acta Geologica Sinica'' 78(4): 883–896.〕 supports this interpretation, because a bisexual flower is present in the region between staminate and pistillate organs. If this interpretation is correct, ''Archaefructus'' may not be basal within angiosperms, rather it may be close to the Nymphaeales or the basal eudicots.
==Popular culture==
In the 2010 movie Predators, Topher Grace's character (Edwin) refers to a strange looking plant - actually a bird of paradise flower (''Strelitzia reginae'') - as "''Archaefructus liaoningensis''". The depicted plant looks nothing like the fossils remains of ''Archaefructus''. It was also said to be poisonous, although there is no actual evidence of it.
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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