CONTENTS 



CHAPTER PAGE 



I. Introductory — Plants in Nature 1 



II. (iENERAL STRUCTURE AND AVORK OF PLANTS . . 5 



III. Roots .... .... 21 



IV. The Stem and the Leaf . . . . 39 

 V. Underground Ste.ms; Storage in Stems and Leaves; 



Reproduction . . . ... 72 



A''I. Buds and Branches ... ... 90 



VII. Flowers .... . . 104 



VIII. Pollination and Fertilization 11.5 



IX. Seeds and Seedlings; Seed Distribttkin 136 



X. The Gke.at Gi;ciups of Plants . 156 



XI. The Bacteria (Sciiizcimycetes) 161 



XII. The Blue-Green Alg.e (Cyanophyck.e) ISO 



XIII. The Green AL(i/E (Ciilorophyce.e) and Other Alg^e 188 



XIV. The Alg.e-Fungi (Phycomycetes) 213 

 XV. The Sac FuNia (A.scomycetes) ; the Lichens; the 



Basidium Fungi (Basidiomycetes) . 226 



XVI. jMosses and LnEHwoKTS (Bryophytes) 257 



XVII. The Pteridophytes . ... 274 



XVIII. Gymnosperms . ... 2f)0 



XIX. Angiosperms . . . . . . 321 



XX. Some Leading Families of Flo\vering Plants and 



their L'ses . ..... :5o5 



XXI. Further Discussion of Dependent Plants . 371 



XXIL Timber: Forestry . . . 390 



XXIIL Plant Breeding . . . 412 



XXIV. Further Discussion of Plant Indlstries . . . 434 



XXV. AVeeds . ... 465 



XXVI. Ecological Groups ; Region.al Distribution of 



Plants . . . . 477 



APPENDIX . . . . ... 515 



GLOSSARY . . . . 520 



INDEX . 533 



