Any of a number of grasses with hard pointed seed heads, some of which are sharp enough to harm livestock.
Heteropogon, Stipa, and other genera, family Gramineae
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。