division Bryophyta
       n : a division of nonflowering plants characterized by rhizoids
           rather than true roots and having little or no organized
           vascular tissue and showing alternation of generations
           between gamete-bearing forms and spore-bearing forms;
           comprises true mosses (Bryopsida) and liverworts
           (Hepaticopsida) and hornworts (Anthoceropsida) [syn: Bryophyta]