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''Scirpus cyperinus'', commonly known as woolgrass, is a herbaceous emergent that is native to the eastern United States and eastern Canada. Other common names include cottongrass bulrush〔(''Scirpus cyperinus''. ) NatureServe.〕 and brown woolly sedge.〔(''Scirpus cyperinus''. ) Washington Burke Museum.〕 This sedge is very variable in appearance. In general, it produces short, tough rhizomes and grows in dense clumps. The fertile stems grow upright. There are five to ten leaves per stem. They are up to 80 centimeters long by 1 centimeter wide. The proximal ones have green or reddish sheaths. The inflorescence has upright or spreading branches bearing cymes of up to 15 spikelets each. The spikelet is cylindrical or oval and measures up to 0.8 centimeters in length. It is covered in reddish, brownish, or black scales. The flowers have six long bristles each, making the inflorescence look woolly.〔 This plant grows in many types of wet habitat, such as marshes and ponds. It can be found in disturbed habitat, such as ditches.〔 This plant often hybridizes with its relatives ''Scirpus atrocinctus'' and ''S. pedicellatus''.〔 Native Americans used this plant for a number of purposes. The Ojibwa people used it to make bags and mats, and the Potawatomi people used it to stuff pillows.〔(''Scirpus cyperinus''. ) University of Michigan Ethnobotany.〕 ==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「Scirpus cyperinus」の詳細全文を読む スポンサード リンク
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