In fruit. A few flowers still. Pipevine swallowtail caterpillars are just starting to show up.
Observed with Roberto Sindaco.
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.