canada odorata

from The Collaborative International Dictionary of English v.0.48

Ihlang-ihlang \Ih*lang`-ih*lang"\, n. [Malayan, flower of
   flowers.]
   A rich, powerful, perfume, obtained from the volatile oil of
   the flowers of {Canada odorata}, an East Indian tree. [Also
   written {ylang-ylang}.]
   [1913 Webster]