Sharpe, A Laboratory Manual in Biology, pages 90-102. American Book Company.
Stevens, Introduction to Botany, pages 81-99. D. C. Heath and Company.
advanced
Clement, Plant Physiology and Ecology. Henry Holt and Company.
Coulter, Barnes, and Cowles, A Textbook of Botany, Part II, and Vol. II. American Book Company.
Darwin, Insectivorous Plants. D. Appleton and Company.
Duggar, Plant Physiology. The Macmillan Company.
Goodale, Physiological Botany, pages 337-353 and 409-424. American Book Company.
Green, Vegetable Physiology. J. and A. Churchill.
Lubbock, Flowers, Fruits, and Leaves, last part. The Macmillan Company.