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Boltonia asteroides : ウィキペディア英語版 | Boltonia asteroides
False aster or White doll's daisy is a species of plant native to the United States and Canada. It is found primarily in the Mississippi Valley and Great Plains from Saskatchewan south to Texas and Florida, with isolated populations in the eastern United States. Reports of the species in New England, New York, and the Pacific Northwest appear to be introductions.〔(Biota of North America Program 2014 county distribution map )〕 ''Boltonia asteroides'' is a small perennial rarely more than 20 cm (8 inches) high. It spreads by stolons (horizontal stems running along the surface of the ground). It has many daisy-like flower heads with white or lavender ray florets and yellow disc florets.〔(Flora of North America, White doll’s-daisy , asterlike boltonia, ''Boltonia asteroides'' (Linnaeus) L’Héritier )〕 The species is sometimes cultivated as an ornamental plant because of its attractive flowers.〔Alfred Pink (Gardening for the Million. )〕 ;Varieties〔〔 * ''Boltonia asteroides'' var. ''asteroides'' - coastal regions * ''Boltonia asteroides'' var. ''latisquama'' (A.Gray) Cronquist - Great Plains, Mississippi Valley * ''Boltonia asteroides'' var. ''recognita'' (Fernald & Griscom) Cronquist - Great Plains, Mississippi Valley, Ohio Valley, Canadian Prairie Provinces; introduced in New England + Pacific Northwest ==References== 〔
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