INDEX. 



The English names are given in common small letters, the Latin generic 

 names in italic, and the names of Tribes, Families, Orders, and the higher 

 divisions, in small capitals. 



Abies, 9 

 Abronia, 122 

 Abutilon, 231 

 Acer, 226 

 ACERACE^E, 226 

 Acerates, 270 

 Achillea, 382 

 Achyropappus, 377 

 Acnida, 121 

 Aconite, 139 

 Aconitum, 139 

 Acorus, 74 

 Acroanthes, 89 

 Acrolasia, 236 

 Actaa, 135 

 Actinella, 379, 380 

 Acuan, 194 

 Adder's Mouth, 89 

 Adder's-tongue, 83 

 Adder's-Tongue Family, i 

 Adelia, 264 

 Adenostegia, 318 

 Adopogon, 404 

 Adoxa, 324 

 ADOXACEJE, 324 

 Mgilops, 55 

 Agastache, 296 

 Agoseris, 407 

 Agrimonia, 189 

 Agrimony, 189 

 Agropyron, 52 

 AGROSTIDE^E, 23 

 Agrostis, 30 

 Alder, 97 

 Aletes, 252 

 Alexanders, 252 

 Alfalfa, 202 

 Alfilaria (Erodium) 

 AHsma, 14 

 ALI SMACKS, 14 

 ALISMALES, 13 

 Alkali-grass (Distichlis) 

 ALLIACE^:, 81 

 Allionia, 123 

 ALLIONIACE^E, 122 

 Allioniella, 123 

 Allium, 8 1 

 Allocarya, 288 

 Alnus, 97 



Alopecurus, 28 

 ALSINACE.E, 127 

 Alsine, 127 

 Alsinopsis, 131 

 Alum-root, 172 

 Alyssum, 161 

 Amaranth, 120 

 AMARANTHACE.E, 120 

 Amaranth Family, 120 

 Amaranthus, 120 

 Amarella, 265 

 AMARYLLIDALES, 86 

 Ambrosia, 328 

 AMBROSIACE^E, 327 

 Amelanchier, 191 

 American Cowslip, 263 

 American Ivy, 228 

 American Laurel, 260 

 Ammania, 240 

 AMMIACE^E, 250 

 Amorpha, 213 

 Amphiophis, 19 

 Amsonia, 269 

 AMYGDALACE^E, 193 

 Anaphalis, 370 

 Anchusa, 289 

 Androcera, 302 

 Andropogon, 19, 20 

 Andropogonea, 19 

 Androsace, 261 

 Anemone, 140 

 Anemone, 140 

 Angelica, 255 

 Angelica, 253, 255 

 ANGIOSPERM^E, n 

 Anisolotus, 202 

 Anogra, 244 

 Antennaria, 367 

 Anticlea, 76 

 ANTHEMIDE^E, 382 

 Anthemis, 382 

 Antheropogon, 36 

 Anthopogon, 265 

 Aphyllon, 320 

 Apinus, 8 



Aplopappus, 343, 346 

 APOCYNACE^E, 269 

 Apocynum, 269 

 Apple Family, 191 



431 



