Thallogen

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Thallogen \Thal"lo*gen\, n. [Gr. ? young shoot or branch, frond
     + -gen.] (Bot.)
     One of a large class or division of the vegetable kingdom,
     which includes those flowerless plants, such as fungi, algae,
     and lichens, that consist of a thallus only, composed of
     cellular tissue, or of a congeries of cells, or even of


     separate cells, and never show a distinction into root, stem,
     and leaf.
     [1913 Webster]