Dutchman's Pipe Aristolochia elegans Category 3 - Must not distribute by sale or gift. Must not release it into the environment. The Problem Dutchman's Pipe is a fast growing vine that smothers and outcompetes natives. It climbs high into the canopy and is regarded as a significant problem in SE QLD and Northern NSW. Dutchman's Pipe is better known for its role in the decline of Richmond Birdwing Butterflies. The vine is toxic and kills caterpillars that try and eat it. To the butterflies, Dutchman's pipe smells exactly the same as Pararistolochia praevenosa, their native host plant, and the butterflies mistakenly lay their eggs on it. Many species of butterfly are vulnerable to Dutchman's pipe but Richmond Birdwings are particularly affected. Identifying Features Soft, flimsy vines and heart-shaped leaves, large tubular flowers Similar Looking Natives Tape Vine (Stephania japonica). Distinguishable as tape vine has more rounded leaves, rather than heart-shaped, and tape vine leaves are more robust than Dutchman's pipe leaves How to remove it Cut and paste - Cut at the base of the vine and paste with 50/50 (50% water, 50% Glyphosate) within 10 seconds, so the vine sucks the chemical into its roots and dies. Prevent the spread! Remove before plants flower and seed. The seeds can survive on the ground for a long time. Return to areas where established vines have been removed to check for new plants popping up. Replace removed vines with Richmond Birdwing Butterfly Vine (pararistolochia praevenosa)! For more information on the Richman Birdwing Butterfly, click here. For more information on Dutchman's pipe, check out the Brisbane Weed Profile WARNING - Herbicides contain hazardous chemicals. Incorrect use can cause injury and damage to the environment. Use with care and contact an expert for advice if unsure..