aristolochia macrophylla(n = noun.plant) aristolochia durior, dutchman's-pipe, pipe vine - hardy deciduous vine having large leaves and flowers with the calyx tube curved like the bowl of a pipe;
is a kind of aristolochia clematitis, birthwort

aristolochia, aristolochia clematitis, aristolochia durior, aristolochia serpentaria, genus aristolochia, great-leaved macrophylla, heritiera macrophylla, hydrangea macrophylla hortensis, magnolia macrophylla, swietinia macrophylla, thermopsis macrophylla