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Hymenopappus artemisiifolius : ウィキペディア英語版 | Hymenopappus artemisiifolius
''Hymenopappus artemisiifolius'', the oldplainsman, is a North American species of flowering plant in the daisy family. It has been found only in the south-central United States, in Texas, Arkansas, and Louisiana.〔(Biota of North America Program, 2014 county distribution map )〕 ''Hymenopappus artemisiifolius'' is a biennial herb up to tall. It produces 20-60 flower heads per stem, each head with 40–60 white, yellow, purple, or red disc flowers but no ray flowers.〔(Flora of North America, ''Hymenopappus artemisiifolius'' de Candolle 1836. )〕 ;Varieties〔〔 *''Hymenopappus artemisiifolius'' var. ''artemisiifolius'' - Texas, Arkansas, Louisiana *''Hymenopappus artemisiifolius'' var. ''riograndensis'' B.L.Turner - Río Grande Valley in southern Texas〔(Turner, Billie Lee. 1956. Rhodora 58(694): 305–306 ) descriptions in English and Latin, commentary in English〕〔(Turner, Billie Lee. 1956. Rhodora 58(694): 289 ) distribution map〕 ==References==
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