n.tall perennial grass of pampas of South America having silvery plumes and growing in large dense clumps
同义词：Cortaderia selloana
英汉双解大词典
pampas grass/ˈpæmpəs, -pəz/
1.
N（名词）
any of various large grasses of the South American genus Cortaderia and related genera, widely cultivated for their large feathery silver-coloured flower branches 蒲苇; 因其大型柔软如羽毛的银色花枝而广泛种植