432 
INDEX. 
Aquilegia, 136 
Arabis, 164, 166 
Arace^e, 74 
Aragalius, 212 
Arales, 74 
Aralia, 249 
Archemora, 254 
Arctostaphylos, 259 
Arenaria, 130, 132 
Argemone, 148 
Argentina, 186 
Argythamnia, 222 
Aristida, 23 
Arnica, 387 
Arrow-head, 14 
Arrow-grass, 14 
Arrow-grass Family, 14 
Arrow-leaf ( Balsamorrhiza ) 
Arrow-wood, 323 
Artemisia, 382 
Arum Family, 74 
Asclepiadace^e, 270 
Asclepiadales, 269 
Asclepias, 270 
Asclepiodora, 271 
Ash, 264 
Ash, Mountain, 193 
Ash, Water, 221 
Ash-leaved Maple, 227 
Aspen, 91 
Asplenium, 4, 5 
Aster, 351 
350, 351, 357 
Astere^e, 337 
Astragalus, 203-212 
Atelophragma, 205 
Athyrium, 4 
Atragene, 141 
A triplex, 116 
Aulospermum, 253 
Avena, 34 
Avene^e, 33 
Avens, 187 
Avens, Mountain, 188 
Bacharis, 366 
Bahia, 377 
Ball-cactus, 237 
Balsam Apple, 325 
Balsam Fir, 9 
Balsamorrhiza, 372 
Balsam-root, 372 
Balsams, 9 
Bane-berry, 135 
Barbarea, 160 
Barberry, 148 
Barberry Family, 148 
Barnyard-grass, 21 
Barley, 55 
Bartonia, 2 36 
Basil-weed, 299 
Bastard Toad-flax, 101 
Batrachium, 142 
Bear-berry, 259 
Beard-grass, 20, 30 
Beard-tongue, 306 
Beckmannia, 35 
Bedstraw, 321 
Beech Family, 97 
Beech-Fern, 2 
Beggar-ticks, 375 
Bell-flower, 325 
Bell-flower Family, 325 
Bell-rue, 141 
Belvisia, 5 
Bent-grass, 30 
Berberidace^e, 148 
Berberis, 148 
Bergamot, Wild, 298 
Berthelotia, 367 
Berula, 253 
Besseya, 313 
Betula, 96 
Betulace^e, 96 
Bidens, 375 
Bigelovia, 341, 343 
Bilberry, 260 
Bindweed, 273 
Birch, 96 
Birch Family, 96 
Bird’s-foot Trefoil, 202 
Bistort, 112 
Bistort a, 112 
Bitter-cress, 163 
Bitter-root, 126 
Blackberry, 180 
Black Grama, 20 
Black Henbane, 303 
Black-eyed Susan, 371 
Black Pine, 8 
Black Saltwort, 264 
Bladder-Fern, 3 
Bladder-pod, 154 
Bladder-pod, Double, 154 
Bladderwort, 319 
Bladderwort Family, 319 
Blanket-flower ( Gaillardia ) 
Blazing Star, 336 
Blepharineuron, 28 
Blite, Sea, 119 
Blite, Strawberry, 116 
Blitum, 116 
Blowball, 409 
Bluebell, 325 
Blue-berry, 260 
Blue Flag, 86 
Blue-grass, 40 
Blue-eyed Grass, 86 
Blue-eyed Mary, 305 
Blue Flag (Iris) 
