Water lettuce (Pistia stratiotes) is a plant that is poisonous to dogs and cats. The toxin in the plant is insoluble calcium oxalates, which can cause mucosal irritation and possible ulceration. If your pet ingests this plant, contact the Animal Poison Helpline for emergency treatment services.
What is Water lettuce?
Water lettuce is a large, herbaceous aquatic plant. Common names include water lettuce, pond lettuce, and duckweed. The plant grows abundantly in salt water habitats.