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