INDEX 



Starred page-numbers indicate where cuts occur. 



PARTS I AND II 



Absorption of carbon dioxide, 166- 

 170. 



Acacia, leaf of, *145. 



Accessory buds, 122, *123. 



Accessory fruits, *226. 



Acuminate, *131. 



Acute, *131. 



Adaptations to conditions of exist- 

 ence, 394. 



Adherent, 204. 



Adnate, 204. 



Adventitious buds, 128. 



Adventitious roots, 36. 



Aerial roots, 36, *37, *38, *39. 



Agaricus, study of, 264-266*. 



Age of trees, 71. 



Aggregate fruits, 225, *226. 



Ailanthus twig, *121. 



Air, relation to germination, 10- 

 12. 



Air chamber, *151, *153, *154. 



Air-passages in Hippurisstem,*173. 



Akene, *222. 



Albuminous substances, 22. 



Algae, 232, 241-257*. 



Algae, classification of, *257. 



Algae, study of, 241-257* 



Alternate, *65, 66. 



Alternate leaves, *140. 



Alternation of generations, 278. 



Althaea leaf, *152. 



Anatomy of plants (see under root, 



stem, leaf, flower, fruit, structure 



of). 



Angiosperms, 233. 

 Angiosperms, oldest, 304, 305. 

 Animal food, need of, 344. 

 Animals, defenses against, 345- 



352* 



Annual growth, indefinite, 69. 

 Annual ring, *100, *101. 

 Annuals, 71. 

 Anther, 201, 202, *203. 

 Anther, modes of opening, *211. 

 Antheridia, *284, 285. 

 Antherozoids, 247, 248, *251, 254, 



*279, *284. 

 Antipodal cells, *215. 

 Ant-plants, 346, *347. 

 Ants plant seeds, *386. 

 Apetalous, *198. 

 Apothecia, 271. 

 Apple leaf, stipules of, *135. 

 Aquatic roots, 37. 



397 



