CONTENTS. 



CHAPTER I. PRINCIPAL GROUPS OF PLANTS. 



PAGE 



INTRODUCTORY , . . . , i 



THALLOPHYTES 6 



Schizophy tes 7 



Schizophyceae (Fission Algae) 8 



Schizomycetes (Bacteria) 12 



Algae 1 6 



Chlorophyceae (Green Algae) 20 



Phaeophyceae (Brown Algae) 28 



Rhodophyceae (Red Algae) 31 



Diatoms 35 



Fungi 40 



Phycomycetes (Alga-like Fungi) 42 



Ascomycetes (Including Yeasts) 47 



Basidiomycetes 56 



Fungi Imperfecti 70 



Lichens 71 



ARCHEGONIATES 75 



Bryophytes 76 



Hepaticae (Liverworts) 80 



Musci (Mosses) 84 



Pteridophytes 86 



Filicales (Ferns) 87 



Equisetales (Horsetails) 96 



Lycopodiales (Club Mosses) 97 



SPERMOPHYTES (SEED PLANTS) 100 



Gymnosperms 101 



Angiosperms 119 



ORGANIC EVOLUTION 128 



CHAPTER II. CELL-CONTENTS AND FORMS OF CELLS. 



PROTOPLASMIC CELL-CONTENTS 134 



NON-PROTOPLASMIC CELL-CONTENTS 140 



FACTORS INFLUENCING GROWTH, INCLUDING FOOD OF PLANTS 246 



FORMS OF CELLS 262 



Parenchyma 262 



Mechanical Tissue 264 



Conducting or Mestome Cells 272 



Protecting Cells 277 



v 



