350 



Index 



Asplenium, A. ebeneum, 338; 



A. ebenoides, 338 

 Aster, 251 

 Azalea, 246, 270 

 Azolla, 195, 218 



Bacteria, 4, 5, 12, 13, 45, 48, 



50, 186, 208, 218 

 Bald Cypress (see " Taxodi- 



um ") 



Balsam (Impatiens), 262 

 Banana, 20, 245, 253, 286, 288 

 Barberry family, 257 

 Barley, 281 

 Barriers to plant distribution, 



267 



Basidiomycetes, 75, 76 

 Beech, 213, 244 

 Beech-drops (Epiphegus), 



217 

 Bees, as agents in pollination, 



179 



Begonia, 113 

 Benthamia, 258 

 Bigeneric hybrids, 337, 340 

 Bignonia family, 228 

 Big-tree (see also "Se- 

 quoia"), 256 

 Biophores, 7, 10, 21 

 Birch, 246, 250 

 Birds, 177, 179, 181, 234, 266 

 Bitter-sweet (Celastrus), 270 

 Black-knot (Plowrightia) 



212 



Bladder-kelp, 58 

 Bladder-weed (Utricularia), 



169, 219 

 Blasia, 218 

 Blood-root (Sanguinaria), 



269 

 Blue-green Algae (see also 



"Cyanophyceae"), 49, 81 



186, 265 



Bodo caudatus, *5i 

 Botrychium, *IO2 

 Botrydium, *82, 83 

 Bracken-fern, 118, 130 

 Bramble (see also " Rubus "), 



261, 262 



Bread-fruit, 20, 279, 286 



Broom, 210, 251 



Brown Algae (see also 

 " Kelp," " Phaeophyceas "), 

 59, 60, 61, 62, 66, 69, 70, 

 188, 189, 190 



Bryophytes (see also " Liver- 

 worts," " Mosses"), 89 



Buckeye (^sculus), 38, 274 



Bud-variation, 20 



Bulbs, Bulbous plants, 202, 

 215, 249 



Bur-clover (Medicago), 275 



Burdock, 173, 267, 288 



Bur-marigold (Bidens), 173 



Bur-oak, 338 



Bur-reed (Sparganium), 154, 

 165, *i67 



Buttercup, 150, 155, 161, 163, 

 172, 227, 229, 254, 261, 262, 

 267, 276, 290 



Butterwort (Pinguicula), 219 



Cabomba, 196 



Cacti, 199, 201, 202, 210, 221, 



244, 249, 271, 272 

 Cakile, 203 

 California, 32, 249, 274; flora 



of, 249, 274 

 California poppy (Esch- 



scholtzia), 316 

 Calochortus (see also " Mari- 



posa"), 202 

 Calyx, 155 

 Cambium, 159, 170 

 Camptosorus, 338 

 Canker-root (Aphyllon), 217 

 Canna, Canna family, 167, 



176, 228, 234, 253 

 Cape Region of Africa, 249 

 Capsella, C. bursa pastoris, 



321 ; C. Heegeri, 321 

 Carboniferous plants, 116, 



130, 131, 132, 134, 135, 236, 



238 

 Cardinal flower (Lobelia car- 



dinalis), *I7I, 293 

 Carex, *I74 



