INDEX 



217 



Base of leaf, 152 



Fig. 92, p. 155 

 Basidia, 53 

 Basidomycetes, 52 

 Bean, garden, Fig. 130, p. 202 

 Beech, Fig. 83, p. 143 

 Beggar ticks, Figs. 122, 134, 135, 



pp. 193, 212, 213 

 Belladonna root, Fig. 73, p. 128 

 Bellwort, Fig. 91, p. 154 

 Benzoin a?stivale, Fig. 92, p. 155 

 Berberis, root, Fig. 73, p. 128 

 Berry, 196 



Fig. 124, p. 195 



Betonica officinalis, Fig. 109, p. 179 

 Betony, Figs. 94, 109, pp. 158, 179 

 Betula lenta, Fig. 131, p. 203 

 populifolia, Fig. 96, p. 161 

 Bidens frondosa, Figs. 122, 134, 



135, pp. 193, 212, 213 

 Biennial roots, 130 

 Bilabiate corolla, 180 

 Bindweed, great, Figs. 80, 109, pp. 



140, 179 

 Birch, black, Fig. 131, p. 203 



gray, Fig. 96, p. 161 

 Birds, seeds distributed by, 213 



Fig. 134, p. 212 

 Bird's foot violet, Fig. 94, p. 158 



nest fungus, Fig. 23, p. 55 

 Black mold, 45; 



asexual reproduction, 47 

 germination of zygospore, 49 

 habitat, 45 

 morphology, 46 

 sexual reproduction (by con- 

 jugation), 49 



vegetative reproduction, 49 

 Blackberry, Figs. 125, 126, pp. 196, 



198 



Bladder fern, Fig. 42, p. 78 

 Wrack, 26 



fertilization, 30 

 habitat, 26 

 histology, 28 

 morphology, 26 

 reproduction, 29 

 Blade, 151 



Bloodroot, Figs. 75, 76, pp. 134,135 

 Blue flat, Fig. 75, p. 134 



gum, Fig. 96, p. 161 

 Boneset, Figs. 91, 134; pp. 154, 212 

 Bouncing Betty, Fig. 108, p. 175 

 Bract, 172 



Branched rhizomes, 137 



roots, 130 



Branches of primary root, 122 

 Brassica'oleracea, Fig. 132, p. 205 

 Bread making, 44 



mold, Figs. 14-16, pp. 45-47 

 Bryophytes, 21 

 Buds, 146 



arrangement, 149 



classes, 146 



Figs. 85-86, pp. 147-148 



nature, 146 



position, 149 



relation to stem, 149 

 Bulbils, 80 

 Bulblets, 138 

 Bulbs, 134, 137 



Fig. 77, p. 136 



Bur thistle, common, Fig. 95, p. 160 

 Burdock, common, Figs. 134, 135, 



pp. 212, 213 



Burgrass, Fig. 135, p. 213 

 Buttercup, Fig. 122, p. 193 

 Butterfly weed, root, Fig. 73, p. 128 

 Butternut, Figs. 83, 102, 123, pp. 



143, 167, 194 



Buttonbush, Fig. 106, p. 173 

 Buttonwood, Fig. 84, p. 144 

 Butyric bacteria, 37 



CABBAGE, Fig. 132, p. 205 

 Caducous calyx, 178 

 Calabar bean, Fig. 133, p. 207 

 Calla palustris, Fig. 106, p. 173 



wild, Fig. 106, p. 173 

 Calyptra, 65 

 Calyx, 109, 177, 178, 185 

 Campanulate corolla, 180 

 Campion, Fig. 116, p. 187 

 Camptosorus rhizophyllus, Fig. 45, 



p. 83 



Campylotropous ovule, 185 

 Canna, garden, Fig. 98, p. 163 



sp., Fig. 98, p. 163 

 Cannabis sativa, Fig. 122, p. 193 

 Capsule, 65, 105 



Fig. 132, p. 205 

 Carcerulus, 200 



Fig. 129, p. 201 

 Carolina poplar, Fig. 86, p. 148 

 Carpellate cones, 100 



