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''Nassella pulchra'', basionym ''Stipa pulchra'', is a species of grass known by the common names purple needlegrass and purple tussockgrass.〔(【引用サイトリンク】url=http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=507084 )〕 It is native to California, where it occurs throughout the coastal hills, valleys, and mountain ranges, as well as the Sacramento Valley and parts of the Sierra Nevada foothills, and Baja California. It grows in many types of local habitat, including grassland, chaparral, and oak woodland. It grows well on clay and serpentine soils.〔(US Forest Service Fire Ecology )〕 ==Description== ''Nassella pulchra'' is a perennial bunch grass producing tufts of erect, unbranched stems up to tall. The extensive root system can reach deep into the soil, making the grass more tolerant of drought.〔(California Native Perennial Grasses. ) Hastings Natural History Reservation.〕 The open, nodding inflorescence is up to 60 centimeters long and has many branches bearing spikelets. The plant produces copious seed, up to 227 pounds per acre in dense stands.〔 The pointed fruit is purple-tinged when young and has an awn up to 10 centimeters long which is twisted and bent twice.〔(Jepson Manual Treatment )〕〔(Grass Manual Treatment )〕 The shape of the seed helps it self-bury.〔 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「Nassella pulchra」の詳細全文を読む スポンサード リンク
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