A MORPHOLOGICAL AND CYTOLOGICAL STUDY 

 OF REPRODUCTION IN THE GENUS ACER 



By William Randolph Taylor, B.S., M.S. 

 With Plates VI-XI. 



CONTENTS 



Introduction 112 



Historical Review 112 



Material and Methods 113 



Floral Development 115 



Pollen Development in Acer negundo 117 



Reduction and Somatic Divisions in Other Species 122 



Ovule Development 126 



Fertilization and Embryogeny 129 



Seedling Anatomy 131 



Summary 133 



Bibliography 134 



Explanation of Plates 134 



