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Chaenactis nevii : ウィキペディア英語版 | Chaenactis nevii
''Chaenactis nevii'' is a North American species of flowering plants in the aster family known by the common name John Day pincushion. It is found only in the John Day Basin area in the US State of Oregon.〔(Biota of North America Program 2014 county distribution map )〕〔Hitchcock, C. H., A.J. Cronquist, F. M. Ownbey & J. W. Thompson. 1984. Compositae. Part V.: 1–343. In C. L. Hitchcock Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.〕 ==Description== ''Chaenactis nevii'' is a perennial up to 30 cm (12 inches) tall. Each branch produces 1-3 flower heads each containing yellow disc florets but no ray florets.〔(Flora of North America, John Day pincushion, ''Chaenactis nevii'' A.Gray )〕 The species is named for American missionary and botanist (Reuben Denton Nevius ) (1827-1913).〔(Gray, Asa 1883. Proceedings of the American Academy of Arts and Sciences 19: 30. )〕
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