This second edition by Martin Kellman is an introduction to the subject for students of both geography and biology. He develops a series of plant geographic concepts that are based primarily in plant population biology, treating in turn processes that operate at the level of the individual plant and the plant population, interactions between plant populations, environmental conditions and plant dissemination in shaping plant species' distributions, and the geography of vegetation. Emphasis throughout is place upon the dynamic nature of the earth's plant cover, and the interplay between contemporary conditions and historical events in shaping plant distributions and evolution.