Dutchman's-pipe \Dutchman's-pipe\ n.
a hardy deciduous American vine ({Aristolochia durior})
having large, heart-shaped leaves and bearing brownish-purple
flowers which have their calyx tubes curved like the bowl of
a tobacco pipe. Formerly classified as {Aristolochia Sipho}.
Syn: pipe vine, {Aristolochia macrophylla}, {Aristolochia
durior}.
[1913 Webster + WordNet 1.5]