Sweet autumn clematis
Clematis paniculata (in Māori puawhananga) is a species of flowering plant in the buttercup family Ranunculaceae. It is one of seven species of clematis native to New Zealand. C. paniculata is the most common of these, and is widespread in forest throughout the country.
It is invasive, however, and displays aggressive growth in many areas of North America. C. terniflora can climb nearly 10 metres high, smothering trees and pulling down telephone poles.