Assimilation, 140. 
Australian blackberry, leaf of, #116. 
Axillary bud, 88, 89, *90. 
Axillary flowers, App., #265. 
Bacillariales, 210. 
Bacilli, #213. 
Bacteria, 210, *218, 214. 
Barbed hairs, 124, *126. 
Barberry, spiny leaves of, *128, 
124. 
Bark, 67-73%, 76, 77. 
Basidia, 229, *230. 
Basidiomycetes, 210. 
Bast, *68, #69, #70, #72. 
Bast-bundle, *68, #69. 
Bean-pod, study of, 188. 
Bean seed, *6. 
Beech twig, 51. 
Bees, 169-173%, #176. 
Beet leaf, #128. 
Beggar’s-ticks, #197. 
Bell-shaped, *152. 
Berry, 181, 188. 
Berry, study of, 181. 
Biennial, 38, 39, 54. 
Biogenesis, law of. 260, 261. 
Birch, branching of, *53. 
Bird-pollinated flowers, 174. 
Birds plant seeds, 198. 
Black mold, study of, 222-224*. 
Bladder-wrack, *219. 
Botany, divisions of, 1-3. 
Box-elder, buds of, #89. 
Box-elder, radial and cross-sections 
of stem of, *70. 
Bract, App., *265. 
Branches formed from adventitious 
buds, 95. 
Branching, alternate, *52. 
ELEMENTS OF BOTANY 
Branching and leaf-arrangement, 
51, *52. 
Branching, opposite, *52. 
Brazil nut, food stored in, 20. 
Breathing-pore, *129. 
Bryophytes, 210, 237-242*. 
Buckeye, bud of, *87. 
Bud, horse-chestnut, 86, 87 
Bud-scales, 86, *87, 88, *92. 
Buds, 86-96%. 
Buds, adventitious, 95. 
Buds, dormant, 95. 
Buds, naked, #88. 
Buds, position of, 88, #89, *90, *97. 
Buds, structure of, 86, *87, #92. 
Bulb, 59, *60, #61, 
Bulb, hyacinth, *60. 
Bulb, onion, 59, *61. 
Burs, 195, *196, *197. 
Buttercup, leaf of, *100. 
Buttercup, study of flower of, 146, 
147. 
Butternut, buds of, 89, *90. 
Cabbage, a bud, 89. 
Cactus, 61, *117. 
Cactus flower, transitions in, *159, 
160. 
Caladium, 59. 
Calyx, *148. 
Cambium, 68-73*. 
Cambium-layer, 71, *72, *73. 
Canna, parallel veining in, *101. 
Capsule, 187, *194. 
Carbon dioxide, absorption of, 136, 
187. 
Carbon dioxide, disposition of, 137, 
138. 
Carnivorous plants, 
*120, *121, 122. 
*118, *119, 
