INDEX AND GLOSSARY. 
Parr I. 
Accessory fruits, 195. 
Acuminate, 86. 
Acute, 86. 
Adaptations to conditions of exist- 
ence, 204-212. 
Adaptiveness in plants, 210-212. 
Adherent, 148. 
Adnate, 148. 
Adventitious buds, 84. 
Adventitious roots, 26. 
Aerial roots, 26, 27. 
Age of trees, 44. 
Aggregate fruits, 194. 
Air cavity, 109-111. 
Air, relation to germination, 8. 
Akene, 184-186. 
Albuminous substances, 24. 
Algze, 224-226. 
Alternate, 41, 94. 
Alternation of generations, 239, 
240. 
Althea leaf, 110. 
Ameceba, 128. 
Anatomy of plants (see under root, 
stem, leaf, flower, fruit, struc- 
ture of). 
Anemone, fruit of, 185. 
Angiosperms, 216. 
Animals, defenses against, 207-210. 
Animal food, need of, 106, 107. 
Annual, 43. 
Annual ring, 53. 
Anther, 146, 154, 155. 
Antheridia, 239. 
Antherozoids, 239. 
Anthodium, 133. 
Antipodal cells, 159. 
Apetalous, having no corolla, 148. 
Apple, wood and bark, 53, 54. 
Aquatic roots, 28. 
Archegonia, 259. 
Arctic willow, 206, 207. 
Arrangement of leaves, 94-98. 
Arrow-shaped, 86. 
Ash, branching of, 40. 
Aspidium, 241. 
Assimilation, 122. 
Autumn leaves, coloration of, 125. 
Axillary bud, 79. 
Axillary flowers, 131. 
Bachelor’s button, flowers and 
fruit, 179, 180. 
Bacilli, 233. 
Bacteria, 233. 
Bark, 52. 
Bast, 54. 
Bast-bundle, 54. 
Bast-cell, 54. 
Bean, 5, 6. 
