Yes, Snake Lilly is toxic to dogs!
Dogs accidentally consuming the Snake Lilly plants can show the following clinical symptoms: Vomiting, Prolonged Depression, Incoordination, Hypersalivaton, Sleepiness Or Excitation, Dilated Pupils, Low Body Temperature, Low Blood Pressure, Coma, Seizure And Death (In Rare Cases).
Snake Lilly consumption is also toxic to Cats.
Toxic Principles Of Snake Lilly: Pentacylic terpenoids (zeorin, missourin and missouriensin).
More Info About The Snake Lilly Plant
Scientific Name: Iris species
Family: Iridaceae.
Also known as: Iris, Flag, Water Flag.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.