384. 
Betulaceae, 372 
Bicollateral bundles, 59 
Bicuculla, 364 
Biddulphiaceae, 334 
Bignonia, 367 
Bignoniaceae, 367 
Birches, 372 
Bird-nest Fungi, 228, 345 
Bixaceae, 363 
Black Blast, 237 
-dot Fungi, 239, 348 
Knot, 219 
Molds, 189, 335 
Mosses, 251, 349 
Rust, 233 
Bladder Algae, 192, 336 
-fern, 259 
Kelp, 201 
Blanc mange, 209 
Blazing Stars, 376 
Blue Greens, 164, 330 
Molds, 222 
-stem Grasses, 360 
Boehmeria, 362 
Bog Mosses, 252, 351 
Boletus, 346 
Bombacaceae, 362 
Bonnemaisoniaceae, 339 
Borraginaceae, 366 
Borrago, 366 
Bothrodendraceae, 354 
Botrychium, 352 
Botrydiaceae, 336 
Botrydium, 192, 336 
Botryococcus, 332 
Botrytis, 239, 348 
Boundary tissue, 46 
Bouteloua, 359 
Bovista, 345 
Brachytheciaceae, 351 
Brake, 259 
Brand-Fungi, 232, 346 
Brassica, 303, 364 
Brassicaceae, 364 
Breathing pores, 51 
Breeding of Plants, 115 
Bremia, 188 
Bridal Wreath, 307 
Bristle Mosses, 252, 350 
Brome Grass, 297 
Bromeliaceae, 360 
INDEX 
Bromus, 297, 359 
Brood cells, 247 
Masses, 246, 252, 351 
Broom-rapes, 321 
Brown Algae, 199, 336 
Seaweeds, 201 
Brucine, 150 
Brunelliaceae, 369 
Bruniaceae, 369 
Bryaceae, 252, 350 
Bryales, 251, 349 
Bryophyta, 242, 348 
Bryopsidaceae, 336 
Bryopsidoideae, 185, 336 
Bryopsis, 192, 336 
Bryum, 350 
Buckeyes, 371 
Buckthorns, 371 
Bud, 45 
Budding, 21, 223 
Buellia, 341 
Buelliaceae, 341 
Bulbs, 319 
Bulrush, 300 
Bunt, 237 
Burdock, 325 
Burmanniaceae, 360 
Bursa, 364 
Burseraceae, 363 
Butomaceae, 357 
Buttercup, 286, 361 
Butyl, 142 
Butyric acid, 140 
Buxaceae, 371 
Buxbaumiaceae, 252, 351 
C 
Cabombaceae, 362 
Cactaceae, 370 
Cactales, 370 
Cactus, 310, 370 
Cactuses, 370 
Caesalpinia, 368 
Caffeine, 149 
Caladium, 358 
Calamariaceae, 3253 
Calamariales, 353 
Calamarineae, 264, 353 
Calamites, 254, 261, 264, 353 
Calamophyta, 261, 353 
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