274 



INDEX 



Baker, O. E., 260 



Balsam fir, 244 



Balsamorrhiza sagittata, 23 



Baltic rush, 222 



Bamboo, growth of stems, 33 



Banyon tree, roots of, 25 



Bare area, 203-206 



Bark, 31, 32 



Barnes, C. R., 26, 40, 54, 72 



Barnyard grass, 223 



Barton, L. V., 218 



Basswood, 227 



Bast cells, 31 



Bastard toadflax, 232 



Batchelor, L. D., 166 



Bates, C. G., 260, 271 



Beach grass, 220 



Bean, 91 



Bearberry, 222 



Beard grasses, 248 



Beardtongue, 251 



Bedstraw, 93, 187 



Beech, 223, 238 



mycorrhizas of, 105 



pollination of, 68 

 Beech-maple forest, 228, 238, 239 

 Beet, food in, 18 

 Beggar's lice, 187 

 Bequaert, J., 64 

 Bergman, F. H., 143 

 Betula liitca, 68, 238 



purnila, 230 

 Bews, J. W., 179 

 Bidens, 186 

 Biennials, 21, 178 

 Big tree, 244 

 Bindweed, black, 91 

 Bio-ecology, 12 

 Biological spectrum, 177 

 Biom, 192 

 Birch, dwarf, 230 



pollination of, 67, 68 



yellow, 238 

 Birds, 87 

 Bison, 58, 59 

 Bittersweet, 91 



nightshade, 91, 93 

 Black alkali, 152 

 Black, E., 241 

 "Black knot," 112 

 Black mustard, 224 

 Blackberries, 226, 227 

 Bladderworts, 61, 62 

 Blastogapha, 86 

 Blazing star, 222 

 Bloodroot, 36, 187, 232 



latex sacs of, 37 

 Blue jointgrass, 226 

 Blueberry, 152, 222, 230 

 Blue-eye Mary society, 197 

 Blue-stem grass, 19, 226 

 Blumenstock, David I., 166 



Boerker, R. H., 260 

 Bogs, 174-175, 230 



aeration in, 174 

 Bose, S. R., 64 

 Bouquet, A. G. B., 88 

 Bouteloua, 249 

 Braid, K. W., 128 

 Brassica nigra, 224 

 Braun, E. L., 254 

 Bray, William L., 230 

 Bromeliaceae, 96 

 Bromley, S. W., 254 

 Broom-rape, 103 

 Brown, S. M., 157 

 Bruner, W. E., 26, 260 

 Buchloa, 249 

 Buckwheat, 121, 251 

 Buffalo grass, 249 

 Buller, A. H. R., 64 

 Bulrush, 168, 226, 229 

 Bumblebees, 77 

 Bunch-grasses, 178 

 Burdock, 186 

 Burges, K., 116 



Burgess, Paul E., 156, 260, 261 

 Bur grass, 187 



marigold, 186 

 Burkholder, P. R., 128 

 Burkholder, Walter H., 136 

 Burkill, I. H., 88 

 Burns, George P., 128 

 Bush herbs, 178 

 Butterflies, 78 

 Butterfly flowers, 83 



weed, 223 

 Butterwort, 61 

 Buttonbush, 222, 224, 229 

 Buxton, P. A., 136 



Cacti, 34 



Cakile edentvla, 221 



Calamagrostis canadensis, 226 



Calamovilfa longifolia, 221 



Calcium, 148 



Calla palvsfris, pollination of, 84 



Calluna, 110 



Campamda aniericana, 227, 234 



Campbell, Douglas Houghton, 254 



Cannon, W. A., 143, 179 



Capillarity, 147 



Capillary water, 147 



Caprifigs, 87 



Carbohydrates, 36 



Carbon", 148 



dioxide in soil, 20, 139 

 in water, 139 

 Carex, 249 



Carnegia gigantea, 164, 252 

 Carpet-herbs, 178 



