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''Eucephalus ledophyllus'' is a North American species of flowering plant in the aster family known by the common name Cascade aster. It is native to Washington, Oregon and northern California in the United States, mostly in the Cascade Mountains.〔(''Eucephalus vialis''. ) The Nature Conservancy.〕 Some of the populations are inside national parks and monuments: Mount Rainier National Park, North Cascades National Park, and Mount St. Helens National Volcanic Monument.〔〔(Biota of North America Program, 2014 county distribution map )〕〔(Turner Photographics, ''Aster ledophyllus'' - Wildflowers of the Pacific Northwest ) photos, description, partial distribution map〕 ''Eucephalus ledophyllus'' is a perennial herb up to 80 cm (32 inches) tall, with a large woody caudex. One plant will usually produce 3-20 flower heads in a showy array. Each head has 5–21 purple ray florets surrounding numerous yellow disc florets.〔(Flora of North America, ''Eucephalus ledophyllus'' (A.Gray) Greene, 1896. Cascade aster )〕 ;Varieties *''Eucephalus ledophyllus'' var. ''covillei'' (Greene) G.L.Nesom - Oregon, California - flower stalks not cottony *''Eucephalus ledophyllus'' var. ''ledophyllus'' - Washington, Oregon - flower stalks cottony ==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「Eucephalus ledophyllus」の詳細全文を読む スポンサード リンク
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