x CONTENTS 



PAGE 



STRIPED VARIETIES AND BUD-VARIATION 190 



Occurrence of Striping in Various Genera De Vries' Eversporting 

 Varieties Inheritance of Striping in Antirrhinum and Zea Emerson's 

 Explanation of Results Connection between Striping and Bud-variation 

 Bud-variation due either to Mendelian Segregation or Somatic Muta- 

 tion. 



THE EFFECT OF OUTSIDE FACTORS ON COLOUR-VARIATION . 200 



Experiments of Molisch on Hydrangea Cultures with Iron and Alu- 

 minium salts Effect of Insolation on Flower-colour. 



CONNECTION BETWEEN COLOUR AND OTHER PLANT CHARACTERS 204 



Colour and Vigour Colour and Flavour Colour and Hoariness in 

 Matthiola Colour and Hooded Structure in Lathyrus. 



THE CHEMICAL INTERPRETATION OF FACTORS FOR FLOWER- 

 COLOUR 207 



Chemical Interpretation of Factors in Antirrhinum Reversible 

 Reactions Chemistry of Different Kinds of Factors Interpretation 

 of Reddening, Blueing, Diluting and Deepening Factors. 



APPENDIX 218 



Further Details of Researches of Willstatter on Flower- and Fruit- 

 pigments Analyses of Pigments of Colour- varieties Bearing on 

 Mendelian Problems. 



BIBLIOGRAPHY 227 



INDEX 305 



