174 Bulletin Jard. Bot. Buitenzqrg, Série III, Vol. V. Livr. 2. 



Tablé of Contents. o 



Page 



Introduction • . . 1 07 



D e V e I o p m e n t o f t h e 1 e a f . . . 1 08 



Historical 108 



Material and methods 112 



General discussion of leaf 112 



Investigations .114 



Form of the developing leaflet 119 



Juvénile leaves 122 



Sheath 124 



Maturation of leaf 126 



Discussion 127 



Summary 130 



The root 131 



General 131 



Air chambers-origin 133 



Secondary roots 135 



Adventitious roots 135 



Pneumathodes : 136 



Summary 138 



The fruit 138 



Varieties of fruits 138 



Différences in fruits 13Q 



Variations within a form 140 



Pisifera or shell-less form 141 



Fruit with accessory floral parts 141 



Distribution of the fibres 142 



Seedless fruits 143 



Shell structure ' 143 



Détails of the pisifera fruit 143 



Summary 145 



The endosperm . . 146 



Contents of endosperm 148 



Germination 148 



T h e h a u s t o r i u m 1 52 



The form of the haustorium 153 



Size of the haustorium 155 



Structure of the haustorium 158 



Ferment and meristem cells 160 



Cytology of digestion 162 



Summary . 165 



Bibliography j()6 



Ex pla n at io II o f plates 168 



