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 
