INDEX 



(.All numbers refer to pages; those in heavy black type indicate illustrations.) 



absciss layer, 245 



accessory buds, 186, 188 



accessory parts of flowers, 270 



accumulation in stems, 190 



achene, see akene 



acorn, 331 



actinomorphic flowers, 287 



adder's tongue, 261 



Adiantum, 419 



aeration, 226 



aerial stems, 145 et seq. 



agriculture, 12 et seq., 101 et seq., 376, 



392 et seq., 398 

 air chamber, 396, 397 

 air passages, 226 

 akene, 327, 329, 330 

 Albugo Candida, 386 

 aleurone, 341, 34s, 347 

 alfalfa, 340, 377 

 algae, 362, et seq. 

 alluvial soil, 100 



alternation of generations, 401 et seq. 

 amaranth, 327 

 amphibious plants, 396 

 andrcecium, 272, 287 et seq. 

 anemone, 290 

 angiosperms, 183, 260, 431, 440 et 



seq. 

 animals as seed carriers, 356 

 annual rings, 177 

 annuals, 139, 158, 337 

 annulus, 417, 418, 420 

 anther, 60, 272 



antheridium, 368, 370, 399, 400, 421 

 Anthoceros, 403, 404 

 anthocyans, 246 

 ants, 313 

 apical, 130 

 apocarpous, 290, 291 

 apple, 83, 181, 292 

 Aralia racemosa, 217 

 arbor vitae, 431 



archegoniophore, 397, 399 

 archegonium, 398, 399, 409, 420, 



430 

 Arisosma triphyllum, 279 

 ascocarp, 386, 388 

 ascomycetes, 390 

 ascus, 387, 388, 390 

 asexual reproduction, 57 

 ash, 187, 280 

 asparagus, 52, 155, 157 

 aspen, 285 

 Aspidium, 418, 421 

 assimilation, 42, 351 

 aster, 170 

 atom, 95 

 autogamy, 303 

 autumnal colors, 242 et seq. 

 available compounds, 349 

 axil, S3, 54, 128 

 axillary buds, 186 



B 



bacteria, 19, 374 et seq., 375, 392 



bacteriology, 375 



Balanophora, 335 



balsam, 171 



balsam poplar, 188 



bamboo, 157, 173, 337 



banana, 82, 216, 335 



banyan, 127 



barberry, 251, 389 



bark, 166, 178 et seq. 



bases, 349 



basidiomycetes, 391 



basidium, 381, 382, 388, 389 



bast, 138 



bast fibers, 176 



bean, 65, 66, 131, 153, 342 



beech, 393 



bees, 311, 313 



beet, 140 



begonia, 125 



berry, 64, 331, 332 



454 



