CONTENTS XIX 



CHAPTER PAGE 



XXX. Seed-bearing Plants (concluded) . . .489 



Monocotyledons 489 



Types of Monocotyledons 491 



XXXI. Evolution 502 



XXXII. Darwinism 510 



XXXIII. Experimental Evolution 520 



XXXIV. Heredity 541 



XXXV. Experimental Study of Heredity 549 



XXXVI. The Evolution of Plants 569 



XXXVII. Paleobotany 578 



XXXVIII. The Evolution of Plants (concluded) 592 



Appendix 621 



