| Noun | 1. | nonvascular plant - any of numerous plants of the division Bryophyta Bryophyta, division Bryophyta - 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) moss - tiny leafy-stemmed flowerless plants hepatic, liverwort - any of numerous small green nonvascular plants of the class Hepaticopsida growing in wet places and resembling green seaweeds or leafy mosses nonvascular organism - organisms without vascular tissue: e.g. algae, lichens, fungi, mosses |