By Stein, William E; Boyer, James S Abstract.-For well over 50 years, the telome theory of Walter Zimmermann has been extremely influential in interpreting the evolutionary history of land plant architecture.

Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics, by John Derbyshire (Joseph Henry, 304 pp., $27.95) THIS is a striking and brilliant book, in many ways the most ambitious science-for-the-public attempt I have ever read.