INDEX 
[Figures in italics indicate pages upon which illustrations occur.] 
Abies, resin gland, 340. 
Abietineae, 219. 
Absorption bands, 360; spectrum, 368, 36$. 
Abstriction, of spores, 65. 
Acetic fermentation, 411. 
Achene, 282. 
Acids, organic, 414. 
Acorus, vascular bundle, 246. 
Acrocarpae, 121. 
Acrogynae, 103. 
Acropetal succession, in flowers, 256. 
Actinomorphic flowers, 256. 
Adder's tongue, 149. 
Adhesion, 324. 
Adiantum, stem section, 160. 
Aecidiospores, 83. 
Aecidium, 83, 84. 
Aerating system, 318. 
Aerotaxy, 449. 
Aerotropism, 474. 
Aestivation, 282. 
Aethalium, 3. 
Agaricaceae, 88. 
Agaricales, 87. 
Agaricus, 89. 
Albizzia, leaf movements, 456. 
Albugo, 65, 66. 
Alcoholic fermentation, 409. 
Aleurone grains, 392. 
Algae, 14. 
Alkaloids, 392, 415. 
Allium, absorption spectra, 369. 
Alternation of generations, Coleochaete, 31 ; 
Polysiphonia, 60 ; rusts, 84 ; higher 
plantf, 92. 
Ament, 279. 
Amides, 360, 392. 
Amphigastria, 104. 
Amphithecium, 95, 97, 99, 108, 113, 115, 118, 
IIQ. 
Amphivasal bundles, 245, 246. 
Amylase, 400. 
Anabaena, 9. 
Anabolism, 402. 
Anacrogynae, 101 ; conclusions, 103. 
Anaptychia, 80. 
Anatropous ovules, 261. 
Andreaeales, 114. 
Androspores, 30. 
Aneimia, sporangium, 157. 
Aneimites, 183. 
Aneura, 101. 
Angiosperms, 180, 238; classification, 276. 
Anisocarpic flowers, 281. 
Annual thickening, 346. 
Annular vessels, 243. 
Annulus, mushrooms, 89; ferns, 155, 156, 
157, 163, 164, 165, 352. 
Anther, 256. 
Antheridium, green algae, 27, 30, 31, 32, 36, 
42, 43; Fucus, 50; Nemalion, 56; Poly- 
siphonia, 59; fungi, 64, 66, 73, 75, 78; 
liverworts, 92, 94, 95, 99, 102, 104, 105, 
106, 107 ; mosses, 112, 115, 117; lycopods, 
127, 129, 135, 140; equisetums, 148; 
ophioglossums, 154; ferns, 166, 167; 
water ferns, 174, 175, 178. 
Antherozoid, 17, 56. 
Anthoceros, 106, 107, 108, 109. 
Anthocerotales, 106 ; conclusions, 109. 
Antipodal cells, 265. 
Apical cell, 42, 46, 98. 
Aplanospores, 34. 
Aplastic products, 412. 
Apocarpous flowers, 279. 
Apogamy, ferns, 169; angiosperms, 275. 
Apogeotropism, 460. 
Apophysis, 119, 120. 
Apospory, ferns, 169. 
Apostrophe, 450. 
Apothecium, 71,72, 78, 79, 80. 
Arales, 277. 
Araucarineae, 220. 
Archegonium, 92 ; liverworts, 94, 96, 99, 
103, 104, 707; mosses, 112, 113, 115, 117, 
118; lycopods, 128, 130, 136, 137, 140; 
equisetums, 148; ophioglossums, 153, 
154; ferns, 167, 168; water ferns, 175, 
179; gymnosperms, 197, 198, 199, 205, 
210, 211, 214, 215, 216, 223, 233; complex, 
223 ; jacket, 198. 
Archicarp, 79. 
Archichlamydeae, 239 ; classification, 278. 
Arthrospores, 9. 
