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・ Pleuropetalum darwinii
・ Pleuropholis
・ Pleurophyllum
・ Pleurophyllum criniferum
・ Pleurophyllum hookeri
・ Pleurophyllum speciosum
・ Pleuroploca
・ Pleuroploca clava
・ Pleuroploca granosa
・ Pleuroploca lyonsi
・ Pleuroploca trapezium
・ Pleuropneumonia
・ Pleuropogon
・ Pleuropogon californicus
・ Pleuropogon hooverianus
Pleuropogon oregonus
・ Pleuropogon refractus
・ Pleuroprucha
・ Pleuroprucha asthenaria
・ Pleuroprucha insulsaria
・ Pleuroptyx
・ Pleuropulmonary blastoma
・ Pleurorthoceras
・ Pleurosauridae
・ Pleurosaurus
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・ Pleurostelma
・ Pleurosternidae
・ Pleurosternon


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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)
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