Plants as providers of food, shelter, and medicine and as one of evolution's great success stories. Phylogenetic principles and methods of analysis used to recognize major families of vascular plants. Flowering plants and the evolution of floral form and function, pollination, and breeding systems. Sources of taxonomic evidence including morphology, anatomy, and DNA. Both traditional and modern identifi- cation tools. The interdisciplinary nature of plant systematics and its importance in modern society. Prerequisite: Biology 20 or 202L. Field trips. One course.