With Vol. VI this comprehensive work is brought to its final completion. It includes, first, a detailed account of the order Marchantiales. Initially the group is given a taxonomically/phylogenetically oriented treatment of the intricate anatomy and morphology. The Marchantiales include not only that bane of elementary botany students,?Marchantia polymorpha, but a whole range of extraordinary plants, with diverse adaptations to a land environment The Hepaticae and Anthocerotae of North America, Volume 6