For several decades botanists have been impressed by the discovery that the distribution of secondary plant substances follows the general lines of plant relationships. However, it soon became clear that little was to be gained from the study of individual compounds and their natural distribu tion. Therefore, more comprehensive studies were attempt ed in which the secondary chemistry of a major plant group was carefully studied and evaluated in the broader context of comparative phytochemistry. Holger Erdtman's admir able work on Coniferae is the foremost example of this kind. Since then, there has been an upswing in the study of the biosynthesis of secondary plant substances and it has become quite customary to make use of biosynthetic knowledge in interpreting chemosystematic evidence. More over, since taxonomists have insisted that use be made of all potentially available evidence for building classifications, it has been claimed that chemosystematics too should con sider the whole array of constituents present in a major taxon. However, in practice it has proved difficult to utilize fully the potential of natural product chemistry and biosynthetic studies for plant systematics and evolution, because bota nists found themselves rather disorientated by the scattered, often hardly accessible chemical literature and the fact that the chemical evidence was difficult for them to evaluate! Although the pioneering work of E. C.

1 Allelochemics as Systematic Markers

Why Micromolecular Systematics
Problems of Micromolecular Systematics
2 Postulates of Micromolecular Evolution
Principles of Micromolecular Systematics
Principles of Ecogeographical Phytochemistry
3 Is Integration of Allelochemics and Morphology Systematically Relevant?
Biochemical Evolution
Macromolecules versus Micromolecules
4 Evolution of Flavonoids in Embryobionta
Chemistry and Systematics
Chemistry and Function
5 Evolution of Allelochemics in Angiospermae
Evolution of Shikimate Derivatives
Evolution of Acetate Derivatives
Evolution of Isopentanylated Phenolics
Chemistry and Systematics
6 Evolution of Benzylisoquinolines in Magnoliidae
Chemistry
Chemistry and Systematics
7 Evolution of Iridoids in Sympetalae
Chemistry
Chemistry and Systematics
8 Evolution of Polyacetylenes in Sympetalae
Chemistry
Chemistry and Systematics
9 Evolution of Indole Alkaloids in Apocynaceae
Chemistry
Chemistry and Systematics
10 Evolution of Quinolones and Coumarins in Rutaceae
Chemistry
Chemistry and Systematics
Systematics and Geography
11 Evolution of Xanthones in Gentianaceae and Guttiferae
Chemistry
Chemistry and Systematics
Systematics and Geography
12 Chemosystematics of Papilionoideae
Flavonoids
Isoflavonoids
Quinolizidines
Non-Protein Amino Acids
Chemistry and Systematics
13 Evolution of Quinolizidines in Papilionoideae
Chemistry
Chemistry and Systematics
Systematics and Geography
14 Evolution of Flavonoids in Tephrosieae
Chemistry
Chemistry and Systematics
Chemistry, Morphology and Geography
15 Evolution of Neolignans and Arylpyrones in Aniba
Chemistry
Chemistry and Systematics
Chemistry and Morphology
Systematics and Geography
16Blue Flower Pigmentation and Evolutionary Advancement
Chemistry
Chemistry and Systematics
17 Is Integration of Allelochemics, Morphology and Ecogeography Systematically Relevant?
Analytical Perspectives
Ecogeographical Perspectives
References
Chemical Compound Index
Plant Name Index.