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Erigeron radicatus : ウィキペディア英語版 | Erigeron radicatus
''Erigeron radicatus'' is a North American species of flowering plant in the daisy family known by the common names Hooker’s fleabane〔 and taproot fleabane The species grows in central Canada (Alberta, Saskatchewan) and parts of the north-central United States, primarily the northern Rocky Mountains and the Black Hills. It has been found in Idaho, Montana, Utah, Wyoming, Colorado, Nebraska, and South Dakota, with a few isolated populations reported from North Dakota.〔(Biota of North America Program 2014 county distribution map )〕 ''Erigeron radicatus'' is a small perennial herb up to 12 centimeters (4.8 inches) tall, producing a woody branching caudex. The plant generally produces only 1 flower head per stem. Each head has 12–85 purple or white ray florets surrounding numerous yellow disc florets. The species grows on rocky slopes, ledges, ridges, and cliff faces at high elevations.〔(Flora of North America, ''Erigeron radicatus'' Hooker, 1834. Hooker’s fleabane )〕〔(Hooker, William Jackson 1834. Flora Boreali-Americana 2(7): page 17 ) diagnosis in Latin, habitat info and figure captions in English〕〔(Hooker, William Jackson 1834. Flora Boreali-Americana 2(7): plate CXXII (122) ) full-page line drawing of ''Erigeron radicatus''〕 ==References==
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「Erigeron radicatus」の詳細全文を読む
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