Meaning of vanilla plant

vanil'la plant"

Pronunciation: [key]
  1. a composite plant, Trilisa odoratissima (or Carphephorus odoratissimus), of the southeastern U.S., having purplish flower heads and vanilla-scented leaves used to flavor tobacco. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.