Mosses and Liverworts (Collins New Naturalist Library, Book 97)A long awaited addition to the botany titles in the highly regarded Collins New Naturalist series. This edition is exclusive to newnaturalists. com Mosses and liverworts known as bryophytes are a group of about 24,000 fairly low growing plants which have no roots to speak of. Nor do they have flowers, but breed instead by spores. Both are commonly found in damp places, like ditches and beside streams. This authoritative guide explains their ecological