Contents. 



Acknowledginents 3 



Introduction 4 



nrganogeny of the Flower 11 



Pollen Sacs and Pollen i^^ 



Ovules and Embryo-sac 22 



Pollen Tubes artificially Grown 24 



Conductive Tissue of Style and Ovary 27 



The Descent of the Pollen Tube 2« 



Endosperm 31 



The Embryo 34 



Integuments 35 



Carpols 36 



Germination 39 



Ilamamelis Arborea 40 



Fother^illa Gardeni 41 



Corylopsis Panciflora 43 



Liquldambar Styracifll^a 44. 



Summary and Conclusion 47 



References 51 



Explanation of Figures 55 



Vita 62. 



