CONTENTS XV11 



CHAPTER PAGE 



XXVIII. The Andrcecium of Angiosperms 380 



Fig. 140. Section of anther and pollen-development of 



Hemerocallis fulva 384 



,, 141. Pollen-grains of Tradescantia wrginica . . 385 

 , , 142. Pollen-grains of Malra crispa, and pollen -tubes . 389 

 143. Pollen-grain of Cucnrbita Pepo . . . .391 



XXIX. The Gynoecium of Angiosperms . . . ... . 394 



Fig. 144. Cross-section of ovary of Delphinium Ajacis . 395 



,, 145. Longi tudinal section of ovule of A conitumNapdlus 399 



, , 146. Ovule and embryo-sac of Monotropa Hypopitys . 402 



,, 147. Ovule and embryo-sac of Orchis pollens . . 405 



, , 148. Ovule and embryo-sac of Torenia asiatica . . 407 



XXX. Structure of the Seed of Angiosperms 409 



Fig. 149. Longitudinal section of seed of Capsella Bursa- 



pastoris . . 410 



,, 150. Longitudinal section of achene of Alisma Plantago 415 

 ,, 151. Sections through grain and embryo of wheat . 418 



XXXI. The Fruit of Angiosperms. Mucilages. Development of 



the Flower . ..>,.,...-... . . . . .423 



Fig. 152. Diagram of a Cruciferous flower . ... 430 



XXXII. Cell-division and Nuclear division. Protoplasmic con- 

 tinuity . . . . . . .-,... .'.... 434 



Fig. 153. Nuclear division in staminal hair of Tradescantia 



virginica . . . . .' . 436 



,, 154. Nuclear division in pollen-grains of Fritittaria 



persica ........ 440 



,, 155. Nuclear division in pollen-grains of Helleborus 



fcetidus 443 



,, 156. Fairchild's perforated pail ..... 445 



,, 157. Rosen's paraffin oven and warm chamber . . 448 



,, 158. Needles and scalpels for microtome work . . 449 



,, 159. Caldwell's rocking microtome .... 452 



,, 160. Direct nuclear division in Tradescantia virginica, 457 



APPENDIX I. English and Metric Weights and Measures . . 459 

 APPENDIX II. List of Plants used for Study 460 



APPENDIX III. List of Reagents and Mounting Media used ; their 



Preparation and Use 475 



APPENDIX IV. General Notes on Methods, and Select List of 



Reagents . . ... 491 



INDEX . . 497 



