GENERAL INDEX. 



Achillea millefoliitm. See Yarrow. 



Acid soil, 118, 119, 120, 141, 151. 



Adventitious roots, 88. 



jEthusa cynapium, 73, 106, 128, 206. 



Agrimonia eupatoria, 26 (fig.), 188, 

 189, 206. 



Agrimony, 25, 26 (fig.), 116, 188, 189, 

 206. 



Agropyron repens. See Couch-grass. 



Agrostis. See Bent-grass. 



A. alba, 190, 206. 



A. stolonifera, 38, 151, 206. 



A. vulgaris, 206. 



Aira ccespitosa, 112, 178, 206. 



A. caryophyllea, 206. 



Ajuga rep tans, 207. 



Alckemilla arvensis. See Lady's 

 Mantle. 



A. vnlgaris, 178, 207. 



Alfalfa, 59, 96. See also Lucerne. 



Allium ursinum. See Ramsons. 



A. vineale. See Crow Garlic and Wild 

 Onion. 



Alluvial areas, 177. 



Alopccurus agrestis, 154. See also 

 Black Bent. 



A. geniculatus, 207. 



A. pratensis, 27, 75. 



America, 97, 115. 



American Weeder, 47. 



Ammonium sulphate, 69. 



Anagallis arvensis. See Scarlet Pim- 

 pernel. 



Animals, weeds distributed by, 23, 74, 



Annual weeds, 46, 58, 84. 



Anthemis arvensis. See Corn Chamo- 



mile. 



A. cotula, 134, 156, 207. 

 Anthoxanthum odoratum, 182. 

 Anthriscus sylvestris. See Wild 



Chervil. 



Anthyllis vulneraria, 187, 208. 

 Antirrhinum orontium, 208. 

 Arabis thaliana, 129, 208. 

 Arable land, eradication of weeds from, 



46-63. 



weeds, definition of, 2. 

 in grass fields, 16. 



Arctium lappa, 73. 



Arenaria serpyllifolia. See Sandwort. 

 Arnoseris pusilla, 208. 

 Arrhenatherum avenaceum, 27, 208. 

 A. avenaceum var. tuberosum, 39, 41 



(fig-)- 



Arrowhead, 178. 

 Arsenite of soda, 59, 67, 96. 

 Artemesia vnlgaris, 208. 

 Asparagus, Bath, 91, 196. See also 



Ornithogalum, pyrenaicum. 

 Assimilation of carbon-dioxide, 5. 

 Association of weeds with all crops, 

 162-4. 



cereals, 172-4. 



peas and beans, 162, 170, 



171. 



root crops, 162, 164. 



" seeds," 162, 166-8. 



Aster tripolium, 118. 

 Atriplex patula. See Orache. 

 Australia, 4, n, 43, 59, no. 

 Avenafatua. See Wild Oat. 

 A.flavescenSy 27. 

 A. strigosa, 12. 

 Avens, 26, 194. 

 Awn, hygroscopic, 25, 188. 



BALLAST, weeds distributed by, 10, 12. 

 Barberry, 70. 



Barley, 5, 6, 7, 51, 57, 59, 99, 101 (fig.), 

 115, 161-74. 



meadow, 178. 



wall, 27. 



wild, 112. 



Barn field, Rothamsted, 9. 



Bartsia odontites. See Red Bartsia. 



Bartsia, red, 91, 93, 102 (fig.)> 148, 149, 



150, 156, 165, 174. 

 Basic slag, 69, 99. 

 Bastard-alkanet, 195. 

 Battlefield, Somme, 76. 

 Beans, 58, 161-74. 

 Bedstraw, 94. 



ladies'. See Galium verum. 



marsh, 178. 

 Belgium, 112. 



Bellis perennis. See Daisy. 



229 



