European maritime sedge naturalized along Atlantic coast of United States; rootstock has properties of sarsaparilla.

一种欧洲的海苔草，沿美国大西洋海归；有菝葜性能的根茎。

Quillworts are heterosporous, mainly aquatic perennials, with a dense rosette of tubular quill-like leaves arising from a short, stout rootstock.

水韭目的植物有异型孢子，是多年水生植物。其管状条形叶密集簇生于粗短的根茎之上。