Based on the polluted status of the Qinhuai River, calamus and narrowleaf bulrush are used to clean the Qinhuai River water.
针对外秦淮河的污染状况，采用挺水植物菖蒲和狭叶香蒲进行试验，对外秦淮河的污染水质进行净化；
2
The iris is a perennial aquatic herb, it narrowleaf also contain volatile aromatic oil, is refreshing Tongqiao, bone health Xiaozhi, insecticidal sterilization.
菖蒲是多年生水生草本植物，它狭长的叶片也含有挥发芳香油，是提神通窍、健骨消滞、杀虫灭菌的药物。 。
3
Leaf cells are about 8 times as long as wide and narrow rhombic in shape.