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''Cirsium eatonii'', commonly known as Eaton's thistle or mountaintop thistle, is a North American species of flowering plants in the aster family. The species has been found in Idaho, Montana, New Mexico, Wyoming, Nevada, Utah and Colorado.〔(【引用サイトリンク】work=USDA PLANTS database )〕 ==Description== ''Cirsium eatonii'' is an erect herb up to 150 cm (60 inches or 5 feet) tall. Leaves are generally hairless but the entire foliage is covered with many long, white spines. One plant produces several flower heads with pink to purple flowers. The species grows in grasslands, sagebrush steppes, open savannahs, etc.〔 ;Varieties〔〔 A number of varieties have been identified, which include: *''Cirsium eatonii'' var. ''clokeyi'' - Clokey thistle, Spring Mountains thistle, white-spine thistle - Nevada *''Cirsium eatonii'' var. ''eatonii'' - Nevada, Utah *''Cirsium eatonii'' var. ''eriocephalum'' - alpine thistle, mountain thistle - Colorado, New Mexico, Utah *''Cirsium eatonii'' var. ''hesperium'' - tall mountain thistle - Colorado *''Cirsium eatonii'' var. ''murdockii'' - northern mountain thistle - Colorado, Idaho, Montana, Nevada, Utah, Wyoming *''Cirsium eatonii'' var. ''peckii'' - ghost thistle, Steens Mountain thistle - Nevada, Oregon *''Cirsium eatonii'' var. ''viperinum'' - Snake Range thistle - Nevada 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「Cirsium eatonii」の詳細全文を読む スポンサード リンク
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