Oyster leaf (Mertensia maritima), also referred to as vegetarian oyster. The leaves have an amazing oyster-like, marine aroma. Delort et al. 2012 identified 109 compounds which give the plant its remarkable taste. The oyster-like taste is caused by four compounds: (Z)-3-nonenal, (Z)-1,5-octadien-3-ol, (Z,Z)-3,6-nonadienal, and (Z)-1,5-octadien-3-one. Oyster leaves can be added to fish dishes.