saprophyte

saprophyte
    n 1: an organism that feeds on dead organic matter especially a
         fungus or bacterium [syn: {saprophyte}, {saprophytic
         organism}]
    

Saprophyte \Sap"ro*phyte\, n. [Gr. sapro`s rotten + fyto`n a
   plant.] (Bot.)
   Any plant growing on decayed animal or vegetable matter, as
   most fungi and some flowering plants with no green color, as
   the Indian pipe.
   [1913 Webster]
    

54 Moby Thesaurus words for "saprophyte":
      algae, autophyte, bean, bracken, brown algae, climber, conferva,
      confervoid, creeper, diatom, fern, fruits and vegetables, fucus,
      fungus, grapevine, green algae, gulfweed, herb, heterophyte, ivy,
      kelp, legume, lentil, liana, lichen, liverwort, mold, moss,
      mushroom, parasite, parasitic plant, pea, perthophyte,
      phytoplankton, planktonic algae, plant families, puffball, pulse,
      red algae, rockweed, rust, sargasso, sargassum, sea lentil,
      sea moss, sea wrack, seaweed, smut, succulent, toadstool, vetch,
      vine, wort, wrack