CONTENTS. 



Dichogamy, either Proterandrous or Proterogynous .... 219 



Proterogyny 219 



Proterandry 220 



Particular Adaptations in Papilionaceous Flowers .... 225 



In Kalmia-blossoms, Iris, &c 229 



Transportation of Pollinia 230 



In Orchidaceae and Asclepiadaceae 231 



Heterogonous Dimorphism and Trimorphism 234 



3. ADAPTATIONS FOR CLOSE FERTILIZATION 240 



Cleistogamy 241 



SECTION V. THE PERIANTH, OR THE CALYX AND COROLLA IN 



PARTICULAR 243 



Perianth as to Duration, Numerical Terms, Union, &c. . . . 243 



Parts of Petals and of Gamophyllous Perianth 245 



Forms of Corolla and Calyx 246 



SECTION VI. THE ANDROSCIUM, OR STAMENS IN PARTICULAR . 249 



The Stamen as a whole ; Numerical Terms 249 



The Filament and the Anther; their Modifications .... 251 



Pollen 256 



Pollen-tubes 258 



SECTION VII. THE PISTILS, OR GYNOSCIUM 259 



1. IN ANGIOSPERMS 259 



Carpel or Carpophyll 260 



Ventral and Dorsal Sutures ; Placenta 261 



Simple or Apocarpous Pistils 262 



Compound or Syncarpous Pistil 263 



With two or more Cells and Axile Placentae ; Partitions . . 264 



With one Cell and Parietal Placentae 265 



With one Cell and Free Central Placenta 266 



Anomalous Placentation 267 



2. IN GYMNOSPERMS 268 



Structure in Gnetaceae 269 



Structure in Coniferae 270 



In the Yew Family 271 



In the Pine Tribe, &c. 272 



In the Cypress Tribe 273 



Structure in Cycadaceae 274 



SECTION VIII. THE OVULE 276 



Its Structure and Position 277 



Its Forms, Orthotropous, Campylotropous, Amphitropous, 



Anatropous 278 



Origin and Morphological Nature of the Ovule 282 



Origination of the Embryo 283 



