INDEX 
Starred page numbers indicate where cuts occur. App. refers to the Appendix. 
Absorption of carbon dioxide, 136- 
140. 
Absorption, selective, 44. 
Acacia, leaf. of, *110. 
Accessory buds, 88, *89, *90. 
Accessory fruits, *189, 190. 
Acuminate, App. I, *3856. 
Acute, App. I, *356. 
Adaptations to conditions of exist- 
ence, 204, 205. 
Adherent, 155, *156. 
Adventitious buds, 95. 
Adventitious roots, 30, *31. 
Aérial roots, 30, *31. 
Agaricus. See Psalliota. 
Age of trees, 54, 55. 
Aggregate fruits, *189. 
Ailanthus twig, *88. 
Air chamber, *128, *129. 
Air, relation to germination, 8-10. 
Akene, *185, 186. 
Albuminous substances, 19. 
Algz, 215-238*. 
Algal fungi, 239, 246-249*. 
Alternate, *52. 
Alternate leaves, *106. 
Alternation of generations, 270, 
271, *285, 286. 
Anatomy of plants. See under Root, 
Stem, Leaf, Flower, Fruit, Struc- 
ture of. 
Angiosperms, 153, 154. 
Animal food, need of, 122. 
Animals, defenses against, 123- 
126*. 
Arnual growth, indefinite, 54. 
Annual ring, *73. 
Annuals, 54. 
Anther, *153. 
Anther, modes of opening, *162. 
Antheridia, 224, #226, #229, 232- 
236*. 
Antipodal cells, #166. 
Ants plant seeds, *199.. 
Apetalous, *149. 
Apple, *322. 
Apple leaf, stipules of, *100, 101. 
Aquatic roots, 31, 32. 
Arch of hypocotyl, 22, *238, 24. 
Archegonia, *226, #229, 232-236*. 
Aristolochia stem, bundle of, *69. 
Aristolochia stem,. cross-section of, 
*68, 70. : 
Arrangement of leaves, 105-110*. 
Arrow-shaped, App., *356. 
Ascus, 252, *253. 
Asexual generation, *281, #292. 
Asparagus, 61, *62. 
Aspergillus, *251. 
Aspidium, *281. 
Asplenium, type study, 282-285*, 
Assimilation, 140. 
367 
