216 



PAGE 



183 



Asclepias 183 



Ash 181 



Asparagus 128 



Aspen 132 



Asplenium 104 



Aster 204 



Astragalus '. . . 161 



Atriplex 139 



Avena 114 



Avens 156 



Bahia 209 



BAI.SAMINACE^ 170 



Balsamorrhiza 209 



Balsam Poplar 132 



Balsamroot 209 



Baneberry 144 



Barberry 147 



Barnyard-grass 109 



Basswood 171 



Bastard Toad-flax 135 



Batrachium 146 



Bearberry 180 



Beard-grass 109 



Beard-tongues 192 



Bear's-grass 128 



Beckmannia 115 



Beckwith's Clover 159 



Bedstraws 195 



Bellwort Family 197 



Bellwort 127 



Bent-grass 113 



BBRBERIDACE^ 147 



Berberis 147 



Berula 179 



BETULACE^E 133 



Betula 133 



Bicuculla 147 



Bidens 209 



Bigelovia 202 



Bilberry 180 



Bindweed 184 



Birch 133 



Bird's- foot Trefoil 160 



Bittersweet 169 



Bitterweed 200 



Black Cherry 158 



PAGE 



Black-eyed Susan 208 



Black Mustard 148 



Black Raspberry .... 154 



Black Snakeroot 177 



Black Walnut 131 



Bladder Campion 142 



Bladder-pod 150 



Bladderwort 194 



Blazing Star 201 



Blight 139 



Blitum 139 



Bloodroot 147 



Blue Cohosh 147 



Blue-eyed Grass 130 



Blue Joint 1 14 



Boltonia 204 



Boneset 201 



BORAGINAGB^ 185 



Borage Family 185 



Botrychium 103 



Bottle Brush 1 76 



Bouncing Bet 141 



Bouteloua 115 



Box Elder 170 



Brachy ely trum 112 



Brake 104 



Brassica 148 



Brauneria 208 



Brewer's Cliff-brake 104 



Brittle-fern 103 



Brome 118 



Bromus 118 



Broomrape Family 194 



Buckbean Family 182 



Buckthorn Family 170 



Buckwheats 135 



Buffalo Berry 174 



Buffalo Burr 164 



Buffalo Clover 159 



Buffalo Currant 153 



Buffalo Grass 115 



Buffalo Pea 161 



Bug-seed 139 



Bulbilis 115 



Bulrush 121 



Bunch-flowers 127 



Bupleurum 179 



