Northern Pipevine (Aristolochia contorta) this is robust (to about 3m = 10ft tall) dense herbaceous climber with perennial rhizomes. It is native to China, Japan, Korea, Russia (Siberia) and is full frost hardy in zone 6. It creates numerous very lovely (but not showy), yellow-green-purple odd-shaped inflorescences.
|The inflorescences are odd-shaped and lovely close up, but not very showy|
|It can be quite large climber|
|Plant in inflorescences just after rain|
|The leaves are glabrous and paller on down surface|