Why it’s bad
It attracts the Richmond Birdwing butterfly, but kills the butterfly’s caterpillars with toxins in the leaves. All the parts of the plant are poisonous and should not be handled without gloves.
Cut near the base and paint with neat herbicide. Carefully collect any fruit or seed and take off site for disposal.
Replace with Richmond Birdwing Vine Pararistolochia praevenosa. The plants need to be at least three years old, healthy and vigorous. Feed and water well.