360 
Bisexual, 127* 
Black knot, 247 
Blackberry, 176 
Blackberry-raspberry hybrid, 188* 
Blade of leaf, 13, 69%, 70* 
Bleeding, 24 
Blue mold, 245* 
Blue-green alge, *219-221 
Bluets, flowers of, 153* 
Bordeaux mixture, 241. See Spraying 
Botany, economic, definition of, 197 
Botany, systematic, definition of, 197 
Box elder, buds of, 96* 
Brace roots, 30* 
Bracken fern, *271 
Branching, 96*, 97* 
Bread mold, #285-2389 
Brown alge, 230, 231* 
Brown rot, 242*, 243 
Bryophytes, #262-269 
Bryophytes, classification of, 281 
Bryophytes, evolution of plants, 305 
Bud scales, 94*, 100*, 101 
Budding, 91* 
Buds, *94-105 
Buds, naked, 94 
Buds, opening of, 94*, 99*, 102 
Buds, position of, *95-97 
Buds, structure of, 94*, 99%, 100* 
Bud-scale scar, 100*, 102* 
Bulb, 87 
Buller, A. H. R., 257-260 
Bumblebee, pollen carrier, 150* 
Bundles, fibrovascular, 11*, 13, 62*, 
63, 67 
Bur cucumber, 75* 
Burbank, Luther, 191 
Burs, 169%, 171 
Buttercup, 126* 
Butterfly, head of, 146* 
Butternut, buds of, 95* 
Cactus, 28, 81* 
Calyx, 14*, 125* 
Cambium layer, 62*, 63, 64, 66, 68, 69 
Camembert cheese, 245 
Canna, leaf of, 70* 
Canning, 206, 207 
Capsella, 803* 
Capsule of moss, *263 
Carbohydrates, 38, 343 
Carbon, 7, 88, 848 
Carbon dioxide, 7, 38, 348 
Carboniferous period, 280, 294 
Carnivorous plants, 53*, 54 
INTRODUCTION TO BOTANY 
Carpel, 125, 126*, 180, 299 
Casuarina, 56* 
Catalpa, hardy, 114 
Catkin, 101* 
Cedar, 294 
Cedar apples, 254 
Cell, 20* 
Cell turgor, 22 
Cell wall, 21* 
Cell, work of, 21, 22 
Cellulose, 21 
Central cylinder, 11*, 20* 
Central placenta, 131* 
Century plant, 318 
Cereals, 314, 815 
Cetraria, 251 
Channels carrying plant food, 43 
Chara, 229*, 260 
Cherry, 317* 
Cherry, leaf of, 69* 
Cherry, wild black, fruits of, 170* 
Chinese agriculture, 48, 177 
Chlorophycez, 260 
Chlorophyll, 36, 37 
Chloroplast, 36* 
Choripetalous, 128 
Chorisepalous, 128 
Citrous fruits, 190 
Cladonia, 261 
Cladophora, 225, 226*, 227, 260 
Classification, 194*-198, 260, 261, 281, 
806 
Clay, 320 
Clayton’s fern, 273* 
Cleistogamous flowers, 141* 
Climbing plants, 74*, 75* 
Closed bundles, 68 
Clover, nitrogen-fixing by, 39, *204- ¢ 
207 
Clover leaf, 77* 
Clover seed, 336 
Club moss, 279*, 280 
Coal, 280 
Coal-forming periods, 280, 294 
Cocklebur, 169* 
Coffee, 58* 
Collenchyma, 64* 
Colors of flowers, 151, 152 
Columella, 236% 
Coming true from the seed, 176 
Comparison of great groups, 305, 306 
Compass plants, 76 
Competition, 169, 170 
Compound pistil, 131* 
Concord grape, 176 
