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Doellingeria : ウィキペディア英語版 | Doellingeria
''Doellingeria'' is a genus of flowering plants in the aster family.〔Greuter, W. (2006+). (''Doellingeria''. ) In: Greuter, W. & E. von Raab-Straube. (eds.). Compositae. Euro+Med Plantbase.〕 It contains species formerly included in ''Aster'' but now considered to be a distinct genus. They are known commonly as tall flat-topped asters〔(''Doellingeria''. ) Flora of North America.〕 or whitetops.〔(''Doellingeria''. ) Integrated Taxonomic Information System (ITIS).〕 There is still some disagreement as to which species should be included in ''Doellingeria.'' Some authorities include up to 10〔(''Doellingeria''. ) The Plant List.〕 or 11 species in ''Doellingeria'', but phylogenetic analyses suggest that any Asian plants in the genus should be classified in ''Aster'', making ''Doellengeria'' an endemic North American genus.〔Li, W. P., et al. (2012). (Phylogenetic relationships and generic delimitation of Eurasian ''Aster'' (Asteraceae: Astereae) inferred from ITS, ETS and trnL-F sequence data. ) ''Annals of Botany'' 109(7), 1341-57.〕 A fourth is now treated as ''Oclemena reticulata''.〔 ''Doellingeria'' as it is now defined is a genus of perennial herbs growing from rhizomes or woody bases. The unbranched stems grow erect and the tallest can reach in height. The alternately arranged leaves have smooth edges and are sometimes woolly or rough-haired. The flower heads are a few millimeters long and contain 2 to 10 white ray florets, sometimes more. The disc florets are light yellow and the lobes at the tips may spread or curl. The fruit is a cypsela with a pappus of three rings of white or tan bristles and an outer ring of scales.〔 ;Species〔(The Plant List search for ''Doellingeria'' )〕〔(Biota of North America Program 2013 county distribution maps )〕 # ''Doellingeria dimorphophylla'' (Franch. & Sav.) G.L.Nesom 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「Doellingeria」の詳細全文を読む
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