viii CONTENTS 



PART II. THE LIFE-HISTORIES AND REPRODUCTION 



OF PLANTS 



CHAPTER PAGE 



XIV. SIMPLE VEGETABLE ORGANISMS . . . 180 



XV. POND-SCUMS, SEAWEEDS, ETC. (ALG^E) . .195 



XVI. REPRODUCTION AMONG THE ALG^E . . .- . 212 



XVII. THE STRUCTURE AND REPRODUCTION OF THE 



FUNGI . . ;. . . . . 230 



XVIII. PHYSIOLOGY OF FUNGI, LICHENS, BACTERIA . 252 



XIX. LIVERWORTS AND MOSSES . . , ; . 269 



XX. FERNS . ' \ 289 



XXI. HORSETAILS AND CLUBMOSSES . . . . 310 



XXII. THE CYCADS AND CERTAIN EXTINCT SEED-BEARING 



PLANTS .... . . . 322 



XXIII. THE CONIFERS . . . . . . 334 



XXIV. THE ANGIOSPERMS . ... . . 354 



XXV. HEREDITY AND EVOLUTION . . . * 374 



APPENDIX . . .... . . 398 



INDEX ... . . .*" . . . 411 



