elementary
Hunter, Laboratory Problems in Civic Biology. American Book Company.
Andrews, A Practical Course in Botany, pages 112-127. American Book Company.
Atkinson, First Studies of Plant Life, Chaps. IV, V, VI, VIII, XXI. Ginn.
Coulter, Plant Life and Plant Uses, Chap. V. American Book Company.
Dana, Plants and their Children, pages 99-129. American Book Company.
Mayne and Hatch, High School Agriculture. American Book Company.
Hodge, Nature Study and Life, Chaps. IX, X, XI. Ginn and Company.
MacDougal, The Nature and Work of Plants. The Macmillan Company.
advanced