a woody climbing plant, Aristolochia sipho, of the eastern US, cultivated for its greenish-brown mottled flowers, which are shaped like a curved pipe: family Aristolochiaceae
Dutchman's-pipe in American English
(ˈdʌtʃmənzˈpaɪp)
noun
any of several hardy, woody twining vines (genus Aristolochia) of the birthwort family having large, brownish or purple, U-shaped flowers with a pouchlike base
Word origin
from the resemblance of the blossom to a pipe bowl