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Sedum
''Sedum'' is a large genus of flowering plants in the family Crassulaceae, members of which are commonly known as stonecrops. The genus has been described as containing up to 600 species
〔(Hideaki Ohba. The taxonomic status of Sedum telephium and its allied species (Crassulaceae). Shokubutsu-gaku-zasshi March 1977, Volume 90, Issue 1, pp 41-56 )〕
of leaf succulents that are found throughout the Northern Hemisphere, varying from annual and creeping herbs to shrubs. The plants have water-storing leaves. The flowers usually have five petals, seldom four or six. There are typically twice as many stamens as petals.
A number of species, formerly classified as ''Sedum'', are now a separate genus ''Hylotelephium''.
Well known European ''Sedums'' are ''Sedum acre'', ''Sedum album'', ''Sedum dasyphyllum'', ''Sedum reflexum'' (also known as ''Sedum rupestre'') and ''Sedum hispanicum''.
== Taxonomy ==
Sedum demonstrates a wide variation in chromosome numbers, and polyploidy is common. Chromosome number is an important taxonomic feature. ('t Hart 1985)
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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