[[File:1232238718367adab44aed39027312b31c8701a08bfbfc.jpg|缩略图|居中|[https://ss0.baidu.com/7Po3dSag_xI4khGko9WTAnF6hhy/baike/s=220/sign=c767f1e2ab18972ba73a07c8d6cc7b9d/8718367adab44aed39027312b31c8701a08bfbfc.sogoujpg 原图链接][https://image.baidu.com/PicBooklet.vsearch/detail?relateImageGroupIdsct=503316480&z=0&ipn=d&word=磨擦草属&step_word=&hs=0&pn=0&spn=0&di=54240&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=1522338738%2C1054757594&os=1037812563%2C2009091182&simid=0%2C0&adpicid=0&lpn=0&ln=598&fr=&fmq=1620868256213_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&lemmaIdse=9151411&nowsme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=15&oriquery=&objurl=https%3A%2F%2Fpic2Fss0.baike.sosobaidu.com%2Fp2F7Po3dSag_xI4khGko9WTAnF6hhy%2Fbaike%2Fs%3D220%2Fsign%2F201202283Dc767f1e2ab18972ba73a07c8d6cc7b9d%2F20120228153238-20348498712F8718367adab44aed39027312b31c8701a08bfbfc.jpg&typefromurl=ippr_z2C%24qAzdH3FAzdH3Fkwthj_z%26e3Bkwt17_z%26e3Bv54AzdH3FrtvAzdH3F%25E0%25BA%25BE%25En%25b9%25Am%25Em%25l8%25lD%25El%25l8%25BD%25Ec%25A9%25bA%25E0%25lD%25lbAzdH3Fdccabc9&gsm=1#simple_0 原图链接][https://baike.sogou.com/v9151411.htm &rpstart=0&rpnum=0&islist=&querylist=&force=undefined 来自 百度 的图片]]]

多年生高大丛生草本。叶片扁平宽大，长披针形。指状或圆锥花序由数枚总状花序组成，罕或总状花序单生，顶生或腋生；小穗单性，雌雄同序，雌花序位于总状花序之基部，其轴脆弱，逐节断落；雄花序伸长，其轴延续，成熟后整个脱落；雄小穗含2小花，孪生于各节，均为雄花；雌小穗单生，嵌陷于肥厚序轴之凹穴中；第一颖质地硬，包藏着小花，第一小花中性，第二小花雌性，孕性 [[ 外稃薄膜质 ]] ，无芒。染色体小型，x=10。