The Biology of the Cycads / / Knut Norstog, Trevor J. Nicholls.

• Superior document: Title is part of eBook package: De Gruyter Cornell University Press Archive Pre-2000
• VerfasserIn: Norstog, Knut,; Nicholls, Trevor J.,
• Place / Publishing House: Ithaca, NY : : Cornell University Press, , [2019]; ©1998
• Year of Publication: 2019
• Language: English
• Physical Description: 1 online resource (384 p.) :; 32-page color insert, 301 halftones, 10 tables

Thoroughly referenced and generously illustrated, this book discusses all aspects of cycadology. A small group of ancient palmlike seed plants noted for their beautiful foliage and often brightly colored cones and seeds, cycads are believed to have been among the first seed-bearing plants. Seed bearing was the basis for their worldwide dominance from about 300 million years ago to about 70 million years ago, when today's familiar flowering plants gained ascendancy. In recent years, interest in cycads has increased, partly as a result of the need for a more complete identification of the range of toxic and carcinogenic substances these plants produce and partly because of the recognition that some compounds from cycads may prove valuable in biomedical research.Many cycads have recently been identified as endangered species, including some that seem to have survived virtually unchanged since the Mesozoic era. Cycads have a specific importance, now at risk of being lost forever, for the information they offer on the origins and evolution of seed plants.Knut J. Norstog and Trevor J. Nicholls discuss cycad anatomy, reproduction, physiology, and growth. They also focus on population biology and the fossil cycadophytes, as well as genera and species from both the Old World and the New World. The Biology of the Cycads is illustrated with numerous maps, diagrams, and drawings, as well as more than 350 photographs, in black and white and in color.

Table of Contents

Frontmatter -- Contents -- Preface -- 1. General Features, Genera, and Relationships -- 2. Anatomy of the Stems, Leaves, and Roots -- 3. Reproduction and Embryo Development -- 4. Physiology and Growth -- 5. Population Biology and Pollination Dynamics -- 6. The Fossil Cycadophytes -- 7. Old World Genera and Species -- 8. New World Genera and Species -- 9. Afterword -- Glossary -- References -- Figure Credits -- Index