viii CONTENTS. 



CHAPTER II. 



THE POWER OF MOTION IN PLANTS. 



CHAPTER HI. 



PLANT GROWTH. 



PAGE 



Oermination of seeds. 48 



The function of green leaves 49 



The plant is a factory.. 50 



The composition of plants 51 



The chemical composition of American grasses 52 



CHAPTER IV. 



CLASSIFYING, NAMING, DESCRIBING, COLLECTING, STUDYING. 



Plant affinity. 60 



Families of greatest worth 61 



Oramineae, the grass family 64 



The name of a plant 69 



Collecting and preserving grasses 70 



Grasses in certain places 73 



How to begin the study 75 



CHAPTER V. 



NATIVE GRAZING LANDS. 



Effectof over-feeding dry districts 78 



The native pastures 80 



The native grasses of the Pacific slope.. 82 



The agricultural grasses of Montana 87 



The native grasses of the great basin 93 



The native grasses of Northern Mexico. 94 



How seeds are distributed . 100 



