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Erigeron salmonensis : ウィキペディア英語版 | Erigeron salmonensis
''Erigeron salmonensis '' is a rare North American species of flowering plant in the daisy family known by the common name Salmon River fleabane..〔 It has been found only in the Salmon River Canyon in central Idaho.〔(Biota of North America Program 2014 county distribution map )〕 ''Erigeron salmonensis '' grows on ledges and cracks in north-facing cliffs. It is a perennial herb up to 35 cm (14 inches) tall, forming a woody underground caudex. The inflorescence generally contains only 1-3 flower heads per stem. Each head contains 11–15 white ray florets surrounding many yellow disc florets.〔(Flora of North America, ''Erigeron salmonensis'' Brunsfeld & G. L. Nesom, 1989. Salmon River fleabane )〕〔(Brunsfeld, Steven J. & Nesom, Guy L. 1989. ''Erigeron Salmonensis'' (Asteraceae), a Rare New Species from Idaho. Brittonia Vol. 41, No. 4 (Oct. - Dec., 1989), pp. 424-428 )〕 ==References==
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