Archegone (ARCHEGONIUM)

Female organs of reproduction of ferns, club mo es, horsetails, true mo es, liverworts, etc. They are minute sacs, each containing a specially modified cell or oösphere, which is fertilized by the action of the antherozoids. IMG:content-0235.png:[blocks in formation] Arch egos a urus: a, section of a tooth; b, scales. ably allied to Labyrinthodon; found in the coal field of Saarbrück, Germany. See LABYRINTHODONΤΑ.