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''Echinacea angustifolia'' (Narrow-leaved purple coneflower or blacksamson echinacea)〔 is a North American plant species in sunflower family. It is widespread across much of the Great Plains of central Canada and the central United States, with additional populations in nearby regions.〔(Biota of North America Program 2014 county distribution map )〕 ''Echinacea angustifolia'' is a perennial herb up to tall with spindle-shaped taproots that are often branched. The stems and leaves are moderately to densely hairy. The plant produces flower heads one per side branch, each at the end of a long peduncle. Each head contains 8-21 pink or purple ray florets plus 200-300 purple disc florets.〔(Flora of North America, Narrow-leaved purple coneflower, blacksamson echinacea, ''Echinacea angustifolia'' de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 554. 1836. )〕 ''Echinacea angustifolia'' blooms late spring to mid summer. It is found growing in dry prairies and barrens with rocky to sandy-clay soils.〔 There are two subspecies: 〔McGregor, Ronald Leighton 1968. Transactions of the Kansas Academy of Science 70(3): 368–369〕〔(Tropicos, ''Echinacea angustifolia'' var. ''strigosa'' McGregor )〕 *''Echinacea angustifolia subsp. angustifolia'' is native to central Canada and the central United States from Saskatchewan and Manitoba in the north to Arizona, New Mexico, Texas, and Louisiana in the south *''Echinacea angustifolia subsp. strigosa'' has a more limited range in Kansas, Oklahoma, Texas, and Louisiana.〔(Echinacea angustifolia ), United States Department of Agriculture PLANTS Profile〕 Many Native American groups used this plant for a variety of medicinal purposes, including pain relief and relief of colds and toothaches.〔(''Echinacea angustifolia''. ) United States Department of Agriculture NRCS Plant Guide.〕 ==References== (of North America ) 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「Echinacea angustifolia」の詳細全文を読む スポンサード リンク
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