Yes, Meadow Saffron is toxic to dogs!
Dogs accidentally consuming the Meadow Saffron 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).
Meadow Saffron consumption is also toxic to Cats and Horses.
Toxic Principles Of Meadow Saffron: colchicine and other alkaloids.
More Info About The Meadow Saffron Plant
Scientific Name: Colchicum autumnale
Family: Liliaceae.
Also known as: Autumn Crocus.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.