moonflower

from WordNet (r) 3.0 (2006)

moonflower
    n 1: pantropical climber having white fragrant nocturnal flowers
         [syn: {moonflower}, {belle de nuit}, {Ipomoea alba}]

from The Collaborative International Dictionary of English v.0.48

Moonflower \Moon"flow`er\, n. (Bot.)
   (a) The oxeye daisy; -- called also {moon daisy}.
   (b) A kind of morning glory ({Ipomoea Bona-nox}) with large
       white flowers opening at night.
       [1913 Webster]