Geared toward undergraduate students, this textbook incorporates recent developments and data (such as DNA sequences) and incorporates phylogenetic principles throughout--from the explanation of phylogenetic methods and principles to the taxonomic survey of vascular plant families. Topics include the history of plant classification; issues relating to variation in plant populations and species, including species concepts, hybridization and introgression; and the sources of taxonomic evidence, including morphology, anatomy, embryology, and chromosomes. The CD-ROM includes over 650 indexed color photos. Annotation copyrighted by Book News, Inc., Portland, OR