INDEX TO THE GENERA. 
A. 
Acer, 65. 
Aceras, 297. 
Achillea, 161. 
Aconitum, 15. 
Acorus, 314. 
Acrostichum, 357. 
Actinocarpus, 281. 
Adonis, 3. 
Adoxa, 147. 
ARgopodium, 139. 
Absculus, 65. 
Abthusa, 133. 
Agraphis, 304. 
Agrimonia, 109. 
Agropyron, 352. 
Agrostemma, 46. 
Agrostis, 336. 
Aira, 337. 
Ajuga, 225. 
Alchemilla, 110. 
Alisma, 280, 
Alliaria, 28. 
Allium, 308. 
Alnus, 276. 
Alopecurus, 334. 
Alsine, 55. 
Althea, 59. 
Alyssum, 34. 
Amaranthus, 248. 
Ambrosia, 186. 
Anacharis, 279. 
Anacyclus, 161. 
Anagallis, 244. 
Anchusa, 201. 
Androsemum, 61. 
Anemone, 2. 
Angelica, 131. 
Antennaria, 165. 
Anthemis, 160. 
Synonyms are in Italics. 
Anthoxanthum, 332. 
Anthriscus, 136. 
Anthyllis, 75. 
Antirrhinum, 211. 
Apargia, 185. 
Apera, 336. 
Apium, 141. 
Aquilegia, 14. 
Arabis, 24, 30. 
Arctium, 171. 
Arenaria, 54. 
Aristolochia, 260. 
Armoracia, 33. 
Arnoseris, 185. 
Arrhenatherum, 338. 
Artemisia, 164. 
Arum, 314. 
Arundo, 335+ 
Asarum, 260. 
Asparagus, 303. 
Asperula, 151. 
Aspidium, 360. 
Asplenium, 358. 
Aster, 166. 
Astragalus, 84. 
Athyrium, 359. 
Atriplex, 251. 
Atropa, 207. 
Avena, 339. 
B. 
Baldingeria, 333. 
Ballota, 233. 
Barbarea, 23. 
Barkhausia, 182. 
Bartsia, 219. 
Batrachium, 9. 
Bellis, 167. 
Berberis, 15. 
Betonica, 231, 
Betula, 276. 
Bidens, 156. 
Blackstonia, 196. 
Blechnum, 357. 
Blitum, 248. 
Blysmus, 318. 
Borago, 200. 
Botryanthus, 308. 
Botrychium, 363. 
Brachypodium, 353. 
Brassica, 30. 
Briza, 349. 
Bromus, 344. 
Bryonia, 115. 
Bunium, 137. 
Bupleurum, 142. 
Butomus, 279. 
Buxus, 260. 
Cc 
Calamagrostis, 335. 
Calamintha, 236. 
Calendula, 186. 
Callitriche, 120. 
Calluna, Igo. 
Caltha, 13. 
Calystegia, 198. 
Camelina, 34. 
Campanula, 186. 
Cannabis, 263. 
Capsella, 38. 
Cardamine, 26. 
Carduus, 174. 
Carex, 321. 
Carlina, 170. 
Carpinus, 268. 
Carum, 140. 
Castanea, 266. 
Catabrosa, 351. 
Caucalis, 130. 
Centaurea, 176. 
Centranthus, 153. 
