GENERAL INDF.X 



Centaurea nigra, 149. See also Hard- 

 head. 



C. scabiosa. See Greater Knapweed. 



Cerastiitm vulgatum. See Mouse-ear 

 Chickweed. 



Cereal crops, 54, 62, 99, 159-74. 



Chalk, intolerance of, 132, 133. 



land, weeds of, 124, 146. 



manuring, 51. 



soil, 117, 122, 127. 

 Chamomile, 16, 74, 76, 87, 115, 131, 



132, 157. 217. 



corn, 62, 129, 130, 151, 156, 167, 



207. 

 Characteristic weeds, 123, 134, 135, 



141, 146, 153. 

 Charlock, 4, ir, 16, 17, 20, 28, 56, 57, 



58, 59, 60, 61, 62, 70, 76, 8r, 82, 83, 



85, 87, 95, 104, 115, 136, 139, 146, 



147, 151, 156, 160, 162, 163, 173. 



See Brassica spp. 

 Chemical means, eradication by, 45, 



54-63, 66-70. 



Chenopodium album. See Fat Hen. 

 Chervil, wild, 17, 46, 64, 176, 179, 185, 



207. 



Chickweed, 4, 9, 18, 19, 28, 31, 46, 62, 

 85, 87, 112, 123, 126, 127, 151, 

 158, 169, 183, 201, 224. 



mouse-ear, 16, 17, 19, 28, 87, 126, 



128, 156, 165, 168, 174, 181, 183, 

 2ir. 



Chicory, 54, 117, 191, 211. 

 Chloride of lime, 62. 

 Chrysanthemum Icucanthemum. See 



Dog Daisy. 



C. segetum. See Corn Marigold. 

 Cichorium intybns. See Chicory. 

 Cicuta virosa. See Cowbane. 

 Cicntin, in. 



Cinquefoil, creeping, 38, 129, 198, 220. 

 Circaa lutetiana, 27. 

 Cirsium acanlc, 65, 211. 

 C. arvense, 36, 179. See also Creeping 



Thistle. 

 C. lanceolatuni, 23, 179. See also Spear 



Thistle. 



C. palustre. See Marsh Thistle. 

 Classification of soils, 122. 

 Ciay, 117, 120, 122, 127, 129. 

 Cleaning crops, 49, 161. 

 Cleavers, 52, 85, 116, 153, 157. See 



also Goosegrass. 

 Climbing weeds, 89. 

 Clover, 6, 50, 51, 53, 5 4, 55, 67, 75, 91 

 93i 95> 9A 9^i in, I59. 166. 



suckling, 44. 



sweet, n, 104. See also Melilotus. 



Cocksfoot, 26, 182, 185, 186. 



Coffee substitutes, 189, 191, 193, 202. 



Colchicine, 108. 



Colchicum antumnale, 38, 91, 107, 109 



(fig.), 178, 192, 212. See also 



Autumn Crocus and Meadow Saffron. 

 Colonisation of dumps by weeds, 12. 

 Coltsfoot, 18, 23, 24 (fig.), 34 (fig.), 37, 



53, 89, 120, 136, 137, 138, 158, 165, 



166, 202, 225. 

 Competition, aerial, 6, 50, 159. 



between plants, 5, 68, 117, 118, 119, 



120, 127, 132, 159, 160, 166. 174, 

 181. 



root, 6. 

 Compost heap, 48. 

 Coniine, 106, 192. 



Conium maculatiim. See Hemlock. 

 Conopodinm denudattim. See Pignut. 

 Continuous cropping, effect of, 7, 9. 

 Convolvulus, 75. 

 C, arvensis. See Bindweed. 

 C. major, 73. 



Copper sulphate, 55, 56, 57, 59, 67. 

 Corm, 38. 



Corn cockle, 4, n, 104, 105, 106, 126, 

 157, 186, 216. 



gromwell, 146, 147, 157, 195, 216. 



salad, narrow fruited, 73. 

 Cornflower, 58, '62. 

 Cosmopolitan weeds, 4, 128. 

 Cotton-grass, 177. 



Couch grass, 16, 17, 32 (fig.), 36, 48, 

 50, 53, 88, 120, 127, 136, 138, 156, 

 169, 174, 176, 179, 189, 206. 



onion, 39, 41 (fig.), 90, 208. 

 Cowbane, 104, no. See also Water 



Hemlock. , 

 Cowslip. 181, 220. 

 Cow-wheat, 93, 112. 

 Crane's-bill, 20, 214. See also Geran- 

 ium. 

 - small-flowered, 150, 157, 167. 



soft or dove's foot, 129, 130, 157, 



167, 172, 173, 174, 183, 214. 

 Creeping jenny, 178, 217. 



weeds, 88. 

 Crcpis, 23. 



C. taraxafifolia, 178, 212. 



C. virens, 97, 212. 



Crocus, autumn, 10^. See also Colchi 



cum antumnale. 

 Cudweed, 23, 150, 156, 167, 213. 



marsh, 141, 146, 157,214. 

 Cultivation, weeds of, 10. 

 Cumarin, 115. 



Cuscuta. See Dodder. 

 C. arvcnsis, 95. 

 C. epilinum, 94. 

 C. tfitkymitm, 94. 

 C. cur opira, 94, 212. 

 C. gronovii, 95. 



