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''Helictotrichon sempervirens'', or blue oat grass, is a species of flowering plant in the Poaceae family of true grasses, native to central and southwest European grasslands. It is a bunchgrass often used as an ornamental grass in garden design and landscaping. The foliage is pale green with a tinge of blue. It grows in an arching shape, up to tall by wide. The grass blooms with pale blue-green flowers in May to August. The plant is an evergreen perennial, although with summer drought stress semi-dormancy occurs. The Latin name ''sempervirens'' literally means "immortal" but in botany means "evergreen". This plant has gained the Royal Horticultural Society's Award of Garden Merit. ==References== * Repertorium Specierum Novarum Regni Vegetabilis. Centralblatt für Sammlung und Veroffentlichung von Einzeldiagnosen neuer Pflanzen. (by Friedrich Fedde ). Berlin 45:7. 1938 * (GrassBase entry ) 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「Helictotrichon sempervirens」の詳細全文を読む スポンサード リンク
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