A century of research on heterostylous plants has passedsince the publication of Charles Darwin's book "TheDifferent Forms of Flowers on Plants of the Same Species" in1877 summarizing his extensive observations and experimentson these complex breeding systems involving geneticpolymorphisms of floral sex organs. Since then heterostylousplants have provided a rich source of material forevolutionary biologists and today they represent one of theclassic research paradigms for approaches to the study ofevolution and adaptation. The present book is the firstmodern and comprehensive accont of the subject. In 10chapters it is concerned with the evolution, genetics,development, morphology, and adaptive significance ofheterostyly. Broad syntheses of research on heterostyly aswell as new theoretical ideas and experimental data areincluded.

1 Heterostylous Genetic Polymorphisms: Model Systems for Evolutionary Analysis

2 Historical Perspective on Heterostyly
3 Floral Polymorphisms and Their Functional Significance in the Heterostylous Syndrome
4 The Development of Heterostyly
5 The Genetics of Heterostyly
6 The Evolution of Heterostyly
7 The Selection of Heterostyly
8 The Application of Sex Allocation Theory to Heterostylous Plants
9 Pollen Competition in Heterostylous Plants
10 Evolutionary Modifications of Tristylous Breeding Systems.