181 
Bird’s-foot Violet (V. pedata), 
35. 
Birthwort Family, 89. 
Bitter Dock, 92. 
Bitternut Hickory, 96. 
Bittersweet, 85. 
Black Alder, 74. 
Black Ash, 89. 
Blackberry, 49, 50. 
Black Bindweed, 92. 
Black Birch, 98. 
Black Cherry, 47. 
Black Currant, 51. 
Black Grass, 113. 
Black Horehound, 83. 
Black Medick, 45.. 
Black Mustard, 34. 
Black Oak, 97. 
Black Oat Grass, 124. 
Black Raspberry (Thimbleberry), 
49, 
Black Scrub Oak, 97. 
Black Snakeroot, 31, 56. 
Black Spruce, 12, 101. 
Black Thorn, 50. 
Black Walnut, 96. 
Bladder Campion, 38. 
Bladderwort, 76. 
Bladderwort Family, 76. 
Bladder Ketmia, 40. 
Blazing star, 60. 
Blitum, 90. 
Blue Beech, 98. 
Blueberry, 71. 
Bluebottle, 67. 
Blue Cohosh, 31. 
Blue-curls, 81. 
Blue-eyed Grass, 110. 
Blue Flag, 110. 
Blue Grass, 126. 
Blue-joint Grass, 124. 
Blue Lettuce, 69. 
Blue Vervain, 80. 
Blue Violet, 35. 
Blue-weed, &3. 
Bloodroot, 32. 
Boeehmeria, 95. 
Borage Family, 83. 
Borraginacee, 83. 
Bostrychia, 158. 
Botrychium, 132. 
Bottle Brush Grass, 128. 
Bouncing Bet, 37. 
Bouteloua,. 125. 
Brake, 133. 
Brachyelytrum, 124. 
Brassica, 34. 
Brasenia, 31. 
Bristly Crowfoot, 30. 
- Bristly Sarsaparilla, 57. 
Briza, 127. 
Brizopyrum, 126. 
Bromus, 127. 
Broom-rape Family, 77. 
Brown Bent Grass, 123. 
Brunella, 82. 
Bryacee, 138. 
Bryee, 140. 
Bryopsis, 165. 
Bryum, 140, 171. 
Buckbean, 87. 
Buckthorn, 43. 
Buckthorn Family, 43. 
Buckwheat, 92. 
Buckwheat Family, 91, 92. 
Buellia, 154. 
Bugle-weed, 81. 
Bunch Berry, 57. 
Burdock, 68. 
Bur-reed, 104. 
Bush Honeysuckle, 95. 
Butter-and-eggs, 78. 
Buttercups, 30. 
Butterfly-weed, 88. 
Butternut, 96. 
Button Bush, 60. 
Buttonwood, 95. 
Buxbaumiewx, 140, 
