INDEX 



(Asterisks preceding page numbers denote illustrations) 



Abronia, 203 



Acacia, 200, 207, 221, 222, 

 253, 3io 



Adaptation, 17, 18, 148 



Adaptability of Angiosperms, 

 181 



Adder-tongue Fern (see 

 " Ophioglossum ") 



Aerating organs, 196 



Agathis, 131, 141, 246 



Agave, 200, 249 



Agriculture, Department of, 

 299, 300; origin of, 279, 

 287 



Air-plants (see also epi- 

 phyte"), 168 



Alfalfa, 284 



Algas (see also " Sea- 

 weeds"), 31, 54, 55, 66, 186, 

 187, 194, 252, 333 



Alga fungi (see also " Phy- 

 comycetes"), 73, 74 



Alisma, *I74 



Aloe, 180, 235, 249 



Alpine plants, 260, 263; arti- 

 ficial, 318 



Alternation of Generations, 

 69, 88, 112, 113, 331 



Altingia excelsa, 261 



Amaryllis, A. family, 166 



Ampelopsis, 257 



Amphisporangiate flowers, 

 154, 161, 162 



Anabsena, 218 



Anemone, 227, 254, 269 



Angiosperms, 112, 132, 137, 

 138, 147, 148, 149, 162, 183, 

 184, 185, 240, 241, 347; 



fossil, 149, 240, 241; origin 



of, 162, 183 

 Antheridium, 87, 99 

 Anthoceros, Anthocerotes, 



*93, 94, 95, 96, 97, *IO2, 103, 



in, 114, 115 



AntS, 221, 222 



Apetalse, 171, 177 



Apetalous flowers, 155, 165 



Aphanochaete, *66 



Aphyllon, 217 



Apocarpous flowers, 155, 156 



Apogamy, 112, 113 



Apophysis, 94 



Apple, 283, 295, 297, 317 



Aquatics, 40, 41, 117, 193, 195, 



196 

 Araucaria, HI, 131, 139, 140, 



141, 246, 248, 253 

 Arbutus (see " Madrono ") 

 Archegoniates (see also 



"Mosses," "Ferns"), 86, 



334 



Archegpnium, 87, 99 



Arenaria Grcenlandica, 263 



Arethusa, *I74, 246 



Arrow-head (see also " Sa- 

 gittaria"), 155, 167 



Artificial selection, 315 



Arum, Aroid, 161, 163, 164, 

 165, 167, 245, 253 



Ascogonium, 76 



Ascomycetes, 75 



Ascus, 76 



Asexual reproduction, Asex- 

 ual plants, 20, 21, 68, 304, 

 331, 333 



Asparagus, 210 



349 



