INDEX 



Absorption, 78, 86. 



Adaptation, 328, 337. 



Air pores, 168. 



Air roots, 82. 



Air spaces, 18. 



Akene, 239. 



Aleurone grains, 89. 



Alfalfa, 293. 



Algae, 98, 165; blue-green, 98; 



brown, 116; green, 102; red, 124. 

 Alga-like Fungi, 144. 

 Alternation of generations, 183; 



fern, 196; liverwort, 171; moss, 



180. 



Amaryllidaceae, 278. 

 Ament, 283. 

 Angiosperms, 220. 

 Annual rings, 54. 

 Anther, 224. 

 Antheridium, Bryophyte, 184; 



fern, 193; Fucus, 124; liverwort, 



169; mildew, 145; moss, 177; 



CEdogonium, 110; Peronospora, 



143; red Algae, 127; Selaginella, 



204; Vaucheria, 112. 

 Anthoceros, 173, 183. 

 Antitoxin, 135. 

 Apples, 289. 

 Apricots, 288. 

 Arbor Day, 323. 

 Archegonium, Bryophyte, 184; 



conifer, 216; fern, 193; liverwort, 



169; moss, 177; Selaginella, 205. 



Archichlamydeae, 282. 

 Ascomycetes, 146. 

 Ascus, 146. 

 Assimilation, 88. 



Associations, 324; see Plant asso- 

 ciations. 

 Axil, 42. 



Bacteria, 130; disease, 134, 135; 

 fermentation, 134; nitrogen fix- 

 ation, 134, 135; reproduction, 

 132; resistance, 133; root-tuber- 

 cles, 136; spores, 133; structure, 

 131. 



Bamboo, 271. 



Banana, 280. 



Bark, 55. 



Barley, 267. 



Basidia, 155. 



Basidiomycetes, 158. 



Bast, 51; root, 74. 



Bean, 294. 



Berry, 239, 286, 298. 



Big tree, 219. 



Blackberry, 287. 



Black knot, 147. 



Blade, 6. 



Blueberry, 303. 



Blue-green Algae, 98. 



Bog moss, 181. 



Bracket Fungi, 156. 



Branches, root, 76. 



Brown Algae, 116. 

 357 



