Contents

About this Book VII

1 Introduction to the Genus Coryphantha 1

2 Ecology of Coryphantha spp 3

2.1 Geographical Distribution 3

2.2 Climate 3

2.3 Geology 4

2.4 Habitats 4

2.5 Conservational Status 5

3 Morphology of Coryphantha 7

3.1 Body 7

3.2 Tubercles 9

3.3 Areoles 12

3.4 Spines 13

3.5 Flowers 15

3.6 Fruits 17

4 History of the Genus Coryphantha 21

4.1 Introduction 21

4.2 Chronology 21

4.3 The Generic Name Coryphantha and the Type Species 26

5 Position and Delimitation of the Genus Coryphantha 29

5.1 Previous, Traditional Interpretation of the Genus Coryphantha 29

5.2 New Interpretation of the Genus Coryphantha 30

5.3 Systematic Overview of the Genus Coryphantha 37

6 Key to the Genus Coryphantha 39

7 The Genus Coryphantha - Descriptions of the Species 43

Colour Plates 73-144

8 Coryphantha spp.in Cultivation 173

8.1 Optimum Cultivation Conditions 173

8.2 Soils and Pots 173

8.3 Watering and Fertilization 174

8.4 Pests and Illnesses 174

8.5 Sowing and Propagation 175

References 177

Appendix 185

Comparison Tables 185

Synonyms and Valid Names 188

Illustration Credits 198

Index 199

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