This guide, intended both for the student and scientist, offers a complete, authoritative reference to the plants of Colorado. It discusses plant geography, special botanical features of the mountain ranges, basins and plains, and explain basic terminology. Interesting anecdotes and introductions are given for each plant family, and hints on recognising the largest families are provided as well. Each volume includes a complete glossary, indices to common and specific names, and hundreds of illustrations. This and its companion volume, have been regarded as the most complete guides available and are essential to readers interested in Colorado's plant life.