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Malacothrix (plant)
''Malacothrix'' is a genus of plants in the dandelion tribe within the sunflower family.〔(Candolle, Augustin Pyramus de. 1838. Prodromus Systematis Naturalis Regni Vegetabilis 7(1): 192 )〕〔(Tropicos, Malacothrix DC. )〕 They are known generally as desert dandelions or desertdandelions. Most are native to western North America although a few have been introduced to South America. Several are found only on offshore islands in the Pacific.〔(''Malacothrix''. ) Flora of North America.〕
Phylogenetic analysis demonstrates that ''Malacothrix'' is not monophyletic. Some of its species are related to ''Atrichoseris'', whereas a second group is more closely related to ''Anisocoma'' and ''Calycoseris''.〔Lee, J., et al. (2003). (Phylogenetic relationships among the primarily North American genera of Cichorieae (Compositae) based on analysis of 18S-26S nuclear rDNA ITS and ETS sequences. ) ''Systematic Botany'' 28(3), 616-26. JSTOR 25063901〕
;Species〔
# ''Malacothrix californica'' - California desertdandelion - CA Baja California, Baja California Sur
# ''Malacothrix clevelandii'' - Cleveland's desertdandelion - CA AZ UT Baja California
# ''Malacothrix coulteri'' - snake's head - CA NV AZ UT NM Baja California
# ''Malacothrix fendleri'' - Fendler's desertdandelion - AZ NM TX Sonora
# ''Malacothrix floccifera'' - woolly desertdandelion - CA NV
# ''Malacothrix foliosa'' - leafy desertdandelion - San Clemente Island
# ''Malacothrix glabrata'' - smooth desertdandelion - CA NV AZ NM ID OR Baja California, Baja California Sur
# ''Malacothrix incana'' - dunedelion - CA
# ''Malacothrix indecora'' - Santa Cruz Island desert-dandelion - Santa Cruz Island
# ''Malacothrix insularis'' - island desertdandelion - Coronados Island in Baja California
# ''Malacothrix junakii'' - Junak's desertdandelion - Anacapa Island
# ''Malacothrix phaeocarpa'' - Davis' desertdandelion - CA
# ''Malacothrix saxatilis'' - cliff desertdandelion - CA
# ''Malacothrix similis'' - twin desertdandelion - CA Baja California
# ''Malacothrix sonchoides'' - sowthistle desertdandelion - OR ID WY CO NM AZ UT NV CA
# ''Malacothrix sonorae'' - Sonoran desertdandelion - Sonora AZ NM TX
# ''Malacothrix squalida'' - Santa Cruz desertdandelion - Santa Cruz Island
# ''Malacothrix stebbinsii'' - Stebbins' desertdandelion - OR CA NV AZ NM UT Sonora
# ''Malacothrix torreyi'' - Torrey's desertdandelion - CA NV AZ NM UT CO WY ID MT OR
# ''Malacothrix xanthi'' - Baja California, Baja California Sur
==References==
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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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