Just planted 3 of them
Aristolochia manshuriensis Kom.
Good looking plant! West facing.
Wright's dutchman's pipe, Wright's pipevine; Aristolochiaceae. Just a single cluster of this inconspicuous and interesting little flower was found around the rocky margin of a permanent reach of a stream; elev. about 4600 ft.
This vine even has a pipevine swallowtail caterpillar on it. Heart shaped leaves and vining habit.
Aristolochia is a large plant genus with over 500 species that is the namesake (type genus) of the family (Aristolochiaceae). Its members are commonly known as birthworts, pipevines or Dutchman's pipes and are widespread and occur in the most diverse climates. Some species, like A. utriformis and A. westlandii, are threatened with extinction.