Yes, Peacock Flower is toxic to dogs!
Dogs accidentally consuming the Peacock Flower 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).
Peacock Flower consumption is also toxic to Cats and Horses.
Toxic Principles Of Peacock Flower: GI Irritants, Tannins.
More Info About The Peacock Flower Plant
Scientific Name: Caesalpinia pulcherrima
Family: Fabaceae.
Also known as: Barbados Pride, Dwarf Poinciana.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.