A naturalized plant of the grass family native to Europe (illustration). It is a perennial herb that grows into a clump. It appears gray-green because of the white hairs all over, which is where its Japanese name comes from. The stem is 30-80cm tall, and the leaves are linear, 10-30cm long and 5-8mm wide, densely covered with velvety white hairs, and the leaf sheaths have white upturned hairs. From May to July, it produces oblong, somewhat dense panicles, each 8-15cm long. The spikelets grow densely on the branches of the inflorescence, are about 4mm long, white with a pale purple tinge, and covered with velvety hairs. There are two florets, the upper one with a short hook-shaped awn. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ヨーロッパ原産のイネ科の帰化植物(イラスト)。多年草で株になる。全体に白い毛があるので灰緑色に見え,和名はこれに由来する。茎は高さ30~80cm,葉は線形で,長さは10~30cm,幅は5~8mmで,密に白いビロード状の毛におおわれ,葉鞘(ようしよう)には白い逆毛がある。5月から7月ころに,長楕円形でやや密な円錐花序を出し,花序の長さは8~15cmある。小穂は花序の枝に密生し,長さは4mmくらい,淡紫色を帯びた白色で,ビロード状の毛があり,小花は2個,上方の小花にかぎ形の短い芒(のぎ)がある。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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