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''Phoebanthus'', called the false sunflower, is a genus of North American plants in the sunflower tribe within the daisy family.〔(Blake, Sydney Fay. 1916. Proceedings of the American Academy of Arts and Sciences 51(10): 520–521 ) description in Latin, commentary in English〕〔(Tropicos, ''Phoebanthus'' S.F. Blake )〕 ''Phoebanthus'' includes two species of herbaceous perennials that are both native to the southeastern United States The genus is a close relative of ''Helianthus'', the genus of the common sunflower, and the plants have the general appearance of a sunflower. ==Taxonomy== ''Phoebanthus'' is characterized by having a pappus of short scales that are usually persistent (don't fall off) compared to the pappus of two deciduous awns (and sometimes a few scales) in ''Helianthus'', and ''Phoebanthus'' is also characterized by a distinctive type of slender, horizontal tuber that forms the perennating organ. ;Species〔(Flann, C (ed) 2009+ Global Compositae Checklist )〕〔(Biota of North America Program 2013 county distribution maps )〕〔(Flora of North America Vol. 21 Page 113 False sunflower, ''Phoebanthus'' S. F. Blake, Proc. Amer. Acad. Arts. 51: 520. 1916. )〕 *''Phoebanthus tenuifolius'' is a diploid that occurs in a relatively small area in the panhandle area of Florida, where it occurs in only 4 counties (Calhoun, Franklin, Gulf, and Liberty) and it is listed by the state as a "Threatened Species". It has also been reported from Escambia County in Alabama. *''Phoebanthus grandiflorus'' is a tetraploid that occurs in peninsular Florida where it has a somewhat broader distribution from Clay and Alachua counties in the north as far south as the area just north of Lake Okeechobee. The relationship between the two species has never been closely analyzed, but it does not appear that ''P. grandiflorus'' is simply an autotetraploid of ''P. tenuifolius''.〔Schilling, E. E., C. R. Linder, R. D. Noyes, and L. H. Rieseberg. 1998. Phylogenetic relationships in ''Helianthus'' (Asteraceae) based on nuclear ribosomal DNA internal transcribed spacer region sequence data. Systematic Botany 23: 177-187.〕 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「Phoebanthus」の詳細全文を読む スポンサード リンク
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