294 
THE LEAF 
Describe the structure of a leaf. What two purposes are served by 
veins? Mention at least four plants that have peculiar leaves. De¬ 
scribe each and tell how it helps the plant. 
REFERENCES 
Bergen, Foundations of Botany, pages 130-177. 
Bergen and Caldwell, Practical Botany, pages 13-20, 39-103. 
Bergen and Davis, Principles of Botany, Chapters X, XI, XII. 
Conn, Biology, pages 114, 129, 135, 218. 
Coulter, Barnes, and Cowles, Textbook of Botany, Vol. I, pages 250, 
319-343. 
Curtiss, Nature and Development of Plants, Chapter I. 
Gager, Fundamentals of Botany, pages 26-46. 
Gibson, Sharp Eyes, pages 121-127. 
Snyder, General Science, page 193. 
