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・ Cirsium rydbergii
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・ Cirsium spinosissimum
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Cirsium vinaceum
・ Cirsium vulgare
・ Cirsium wheeleri
・ Cirsium wrightii
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・ Cirsonella
・ Cirsonella ateles
・ Cirsonella carinata
・ Cirsonella consobrina
・ Cirsonella cubitale
・ Cirsonella densilirata
・ Cirsonella extrema
・ Cirsonella floridensis
・ Cirsonella gaudryi


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Cirsium vinaceum : ウィキペディア英語版
Cirsium vinaceum

''Cirsium vinaceum'' is a rare species of thistle known by the common name Sacramento Mountains thistle. It is endemic to Otero County, New Mexico, in the United States, where it is known only from the Sacramento Mountains.〔(''Cirsium vinaceum''. ) The Nature Conservancy.〕〔(''Cirsium vinaceum''. ) Center for Plant Conservation.〕 The plant can be found in six canyon systems in a southern section of this mountain range spanning about 32 kilometers.〔USFWS. (''Cirsium vinaceum'' Five-year Review. ) August, 2010.〕〔(''Cirsium vinaceum''. ) New Mexico Rare Plants.〕 It is rare because it is limited to a specific type of mountain wetland which is both naturally uncommon and threatened by a number of forces.〔 The plant was federally listed as threatened in 1987.〔USFWS. (Final rule to determine ''Cirsium vinaceum'' (Sacramento Mountain Thistle) to be threatened species. ) ''Federal Register'' June 16, 1987.〕
==Description==
This thistle is a perennial herb which can grow to 200 cm (80 inches) in height. The plant is mostly purple, particularly the stems and inflorescences. The rosetted leaves are up to 50 cm (20 inches) long and are mostly green, edged with yellow spines. Each robust plant produces many flower heads which hang on nodding branches. Flowering occurs during the summer. Each head is 3〔 to 5〔 centimeters wide and long and has an involucre of phyllaries which are purple, curve outward, and taper into hard, toothed spines. The head bears many hairlike pinkish purple flowers. The fruit is an achene with a plumelike pappus up to 2 centimeters long. This thistle may resemble musk thistle (''Carduus nutans'') in appearance.〔〔(Flora of North America, Sacramento Mountains thistle, ''Cirsium vinaceum'' (Wooton & Standley) Wooton & Standley )〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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