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Pleuropogon oregonus : ウィキペディア英語版 | Pleuropogon oregonus
''Pleuropogon oregonus'' is a species of grass known by the common name Oregon semaphoregrass. It is endemic to Oregon in the United States, where there are only two populations.〔(''Pleuropogon oregonus''. ) Center for Plant Conservation.〕〔(''Pleuropogon oregonus''. ) Oregon Department of Agriculture.〕 It has been called "one of the rarest grasses in North America."〔 ==Description== ''Pleuropogon oregonus'' is a rhizomatous perennial grass, producing stems up to 90〔 to 95〔(''Pleuropogon oregonus''. ) Grass Manual Treatment.〕 centimeters tall. The erect stems are spongy in texture. The ligule may be a centimeter long. The leaves are up to 17 centimeters long. The inflorescence is a raceme bearing 6, 7, or 8 spikelets. The spikelets are up to 4 or 5 centimeters long and stick out from one side of the raceme. The spikelets are green with a purple tinge and each contains up to 14 flowers.〔〔 Flowering occurs in June and July.〔
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「Pleuropogon oregonus」の詳細全文を読む
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