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''Stipa avenacea'' - renamed ''Piptochaetium avenaceum'', and commonly called black oat grass, blackseed needle grass or blackseed speargrass, is a perennial bunchgrass native to Eastern North America. It is a member of the grass family Poaceae. ==Distribution== ''Stipa avenacea'' is commonly found in the Eastern United States, within various types of habitats, which include: *grasslands *deciduous hardwood hammocks, thickets, and dry woods. *upland woodlands and forests (such as dryer oak woodlands). *savannas and clearings. *rocky slopes and outcrops. The species distribution is mostly found in the Southeastern and Northeastern United States. It is found in the Great Lakes region of the U.S. Midwest and Ontario (Canada), and the shortgrass prairies of the south-central U.S. as well. The range has been documented in: Alabama; Pennsylvania; Rhode Island, New York and Florida, North and South Carolina; Georgia; Michigan; Illinois; Oklahoma, and many other states adjacent to these. 〔(USDA: Native range of ''Stipa avenacea'' ) . accessed 6.26.2012〕 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「Stipa avenacea」の詳細全文を読む スポンサード リンク
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