Yes, Texas Umbrella Tree is toxic to dogs!
Dogs accidentally consuming the Texas Umbrella Tree 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).
Texas Umbrella Tree consumption is also toxic to Cats and Horses.
Toxic Principles Of Texas Umbrella Tree: Tetranortriterpenes (meliatoxins).
More Info About The Texas Umbrella Tree Plant
Scientific Name: Melia azedarach
Family: Meliaceae.
Also known as: China Ball Tree, Paradise Tree, Persian Lilac, White Cedar, Japanese Bead Tree, Bead Tree, Pride-of-India, Chinaberry Tree.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.