CONTENTS. 



The Movements and Habits of Plants. 



The Movement of Plants in Relation to their Wants . . .2 



The Power of Movement in Animal and Plant compared . . 4 



Advantages of Cross-Fertilization . . . . .6 



Potency of the Sexual Elements in Plants ... 6 



Experiments in Crossing . . . . . .8 



The Struggle for Existence among Seeds . . ... 9 



-Practical Application of these Views . . . . .9 



Marriages of First Cousins . . . . .11 



Development of the Two Sexes in Plants . . . .12 



Why the Sexes have been reseparated . . . .14 



Comparative Fertility of Male and Female Plants . . .15 



Effect of Climate on Reproduction . . . .16 



Causes of Sterility among Plants . . . . .17 



An " Ideal Type " or Inevitable Modification ... 18 



Special Adaptations to a Changing Purpose . . . .19 



An Illustration ....... 21 



As interesting on the Theory of Development as on tbat of Direct 



Interposition . . . . . . .22 



The Sleep of the Plants ...... 24 



Self-Protection during Sleep . . . . . .25 



Influence of Light upon Plants ..... 28 



Influence of Gravitation upon Plants . . . . .29 



The Power of Digestion in Plants . . . .31 



Diverse Means by which Plants gain their Subsistence . . 34 



How a Plant preys upon Animals .... 35 



