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^, 226 



Acerates, 270 

 Achillea, 382 

 Achyropappus, 377 

 Acnida, 121 

 Aconite, 139 

 Aconitum, 139 

 Acorus, 74 

 Acroanthes, 89 

 Acrolasia, 236 

 Actcea, 135 

 Actinella, 379, 380 

 Acuan, 194 

 Adder's Mouth, 89 

 Adder's-torigue, 83 

 Adder's-Tongue Family, i 

 Adelia, 264 

 Adenostegia, 318 

 Adopogon, 404 

 Adoxa, 324 

 Adoxace^^ 324 

 ^gilops, ss 

 Agastache, 296 

 Agoseris, 407 

 Agrimonia, 189 

 Agrimony, 189 

 Agropyron, 52 

 Agrostide.«, 23 

 Agrostis, 30 

 Alder, 97 

 Aletes, 252 

 Alexanders, 252 

 Alfalfa, 202 

 Alfilaria (Erodium) 

 Alisma, 14 

 Alismace^, 14 

 Alismales, 13 

 Alkali-grass {Distichlis) 

 Alliace.5;, 81 

 Allionia, 123 

 Allioniaceje, 122 

 Allioniella, 123 

 /4Wi«»jj 81 

 Allocarya, 288 

 Alnus, 97 



Alopecurus, 28 

 Alsinaceje, 127 

 Alsine, 127 

 Alsinopsis, 131 

 Alum-root, 172 

 Alyssum, 161 

 Amaranth, 120 

 Amaranthace^, 120 

 Amaranth Family, 120 

 .<4»nara»*/tMi, 120 

 Amarella, 265 

 Amaeyllidales, 86 

 Ambrosia, 328 

 AMBROSiACE.ffi, 327 

 Amelanchier, 191 

 American Cowslip, 263 

 American Ivy, 228 

 American Laurel, 260 

 Ammania, 240 

 Ammiace^, 250 

 Amorpha, 213 

 Amphiophis, 19 

 Amsonia, 269 



AMYGDAI,ACE.iE, I93 



Anaphalis, 370 

 Anchusa, 289 

 Androcera, 302 

 Andropogon, 19, 20 

 AndropogonecE, 19 

 Androsace, 261 

 Anemone, 140 

 Anemone, 140 

 Angelica, 255 

 Angelica, 253, 255 

 Angiosperm^, II 

 Anisolotus , 202 

 y3«ogra, 244 

 Antennaria, 367 

 Anticlea, 76 

 Anthemide^, 382 

 Anthemis, 382 

 Antheropogon, 36 

 Anthopogon, 265 

 Aphyllon, 320 

 Apinus, 8 



Aplopappus, 343, 346 

 Apocynace.*, 269 

 Apocynum, 269 

 Apple Family, 191 



431 



