一本芒属（学名：Cladium）是莎草科下的一个属，为多年生草本植物。该属共有约50－60种，分布于热带和温带地区，盛产于澳大利亚。

Cladium (Fen-sedge, Sawgrass or Twig-sedge) is a genus of large sedges, with a nearly worldwide distribution in tropical and temperate regions. These are plants characterized by long, narrow (grass-like) leaves having sharp, often serrated (sawtooth-like) margins, and flowering stems 1–3 m tall bearing a much-branched inflorescence. Like many plants found in wet habitats, it has deeply buried rhizomes that can produce tall shoots with dense canopies.