Alisma orientale

Alisma orientale, commonly known as Asian water plantain is a flowering plant species in the genus Alisma found in Asia.
Alisma orientale is sometimes treated as a variety of Alisma plantago-aquatica. The rhizomes of A. orientale have been used as a traditional Chinese medicine, ze xie. However, it may have serious side effects or even toxic effects such as hepatotoxicity. The rhizome of the plant is also a herb used in kampo Japanese medicine.
The seed contains cis-aconitic anhydride ethyl ester and cis-2,4,5-trihydroxycinnamic acid.