Counting the many types of plants on Earth is a daunting task. In fact, even botanists need to estimate--and their approximate number is more than 390,000 species! Readers of this enlightening text will learn about various plants and how scientists divide them into groups, including vascular and nonvascular plants, and annuals and perennials. They'll learn about mosses, ferns, ginkgoes, wildflowers, conifers, and much more. Eye-catching photographs of plants from around the world beautifully illustrate the great diversity of plant life. Accessible text and helpful diagrams encourage further exploration of fun and fascinating botanical topics.