Saw five California Pipevine Swallowtail caterpillars munching in/on this patch today.
Found on side of tree in large fire dead fall area -- disturbed habitat
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.