Wisteria

Wisteria is a lovely climbing plant with purple flowers that sway gently in the wind, almost like a willow. You can find it in spots like China, Japan, Canada and the eastern United States, and folks often grow it to spruce up gardens or buildings. But it's pretty risky for small pets though, because the whole plant—especially the seeds and pods—is poisonous. Even just chewing on the woody vines might make your pet sick, so don't let them get at it at all; it could lead to some serious health troubles.