GENERAL INDEX 



235 



Morning glory, 75. 



Moss, 69, 70. 



Mosses, 181. 



Muck-weed, 48. 



Mud, weeds distributed by, 15, 16. 



Mullein, great, 73. 



Mustard, 50, 75, 115. 



ball, ii. 



hedge, 129, 223. 



mithridate, 17, 224. See also 



Thlaspi avveme. 



white, 123, 139, 146, 147, 156, 165. 

 Mycelium, 182. 



Myosotis arvensis. See Forget-me-not. 

 M . palustris, 217. 

 M. versicolor, 217. 

 Myosurus minimus, 217. 



Narcissus pseudo-narcissiis, 181. 

 Nepeta cataria, 73. 

 N. glechoma, 129, 195, 217. 

 Neslia paniculata, 11. 

 Nettle, hemp, 151, 213. 



- small, 141, 143, 153, 158, 225. 



- stinging, 46, 62, 64, 65, 66, 68, 88, 



94, 95, 129, 176, 179, 185, 186, 



188, 194, 203, 225. 

 New Zealand, n, 70, no. 

 Nickel sulphate, 59, 60. 

 Nightshade, black, 31, 95, in, 224. 



enchanter's 26. 

 Nipplewort, 87, 136, 140, 157, 215. 



OAT, tall, 27, 42, 176. 



wild, 4, 12, 15, 16 (fig.), 25, 51, 58, 



71, 188, 208. 



yellow, 27. 



Oats, n, 50, 57, 59, 61, 78, 100, 112, 161- 



74- 



Occasional weeds, 122. 



(Enanthe crocata, 73. 



CE. pimpinelloides, 217. 



Oil, 190. 



Onion, wild, 17, 18, 38, 39, 53, 58, 91. 

 See also Garlic. 



Ononis repens = O. arvensis, 18, 179,217. 



Orache, 12, 14 (fig.), 62, 81, 87, 136, 

 140, 151, 156, 169, 183, 188, 208. 



Orchard grass, 186. See also Cocks- 

 foot. 



Orchis, early. See Orchis mascula. 



Orchis maculata, 218. 



O. mascula, 195, 196, 218. 



O. morio, 218. 



Ornithogalum pyrenaicum, 38, 91, 196, 

 218. 



Ornithopus perpusillus, 218. 



Orobanche. See Broomrape. 



O. major, 218. 



O. minor, 96, 97, in. 



0. ramosa, 97. 

 Overcrowding, effect of, 5, 6. 



' PANAISIE," 112. 

 Pansy, field, 31, 87, 147, 148, 149, 151 



152, 158, 165, 167, 226. 

 Papaver argemone, 131, 133, 157, 218. 

 P. dubium, 128, 218. 

 P. hybridum, 219. 

 P. rhceas. See Poppy. 

 Paper-making, 189. 

 Pappus, 23. 



Parasites, eradicat on of weeds by, 70. 

 Parasitic weeds, 91, 92-102, 179. 

 Parsley, fool's, 73, 104, 106, 128, 2o5. 

 Pasture, calcareous, 64. 



down, 63, 69. 



- old, 2, 76, 77, 79. 

 Pea, wild, 71. 

 Peas, 48, 58, 161-74. 

 Peat, 122, 144, 177. 



soils, weeds of, 124, 150. 

 Pedicularis, 93. 



P. palustris, 179. 

 P. sylvatica, 219. 

 Pennycress, 115. See also Thlaspi 



arvense. 



Pennywort, 178. 

 Perennial weeds, 46, 86, 88. 

 Persecaria, 17, 31, 62, 104. See also 



Willow-weed. 

 Pests, insect, 70, 71. 

 Pheasant crops, weed seeds in, 29. 

 Phleum pratense, 75. See also Cat's- 



tail. 



Physiological conditions in soil, 83. 

 Pig, 74, 105, 108, 187-205. 

 Pignut, 38, 87, 178, 181, 185, 186, 192, 



193, 212. 

 Pigweed, 75. 

 Pimpernel, scarlet, 16, 19, 31, 73, 85, 



87, 104, 147, 148, 149, 156, 165, 173, 



187, 207. 



Pimpinella saxifraga, 219. 

 Plant nutrition, 92, 94, 99. 

 Plantago coronopus, 219. 

 P. lanceolata. See Ribwort Plantain. 

 P. major. See Greater Plantain. 

 P. media. See Hoary Plantain. 

 Plantain, 31, 74, 88. 



greater, 9, 16, 88, 136, 157, 165, 173, 



181, 183, 184 (fig.), 197, 219. 



hoary, 73, 88, 94, 120, 134, 153, 157, 



181, 183, 197, 219. 



ribwort, 28, 74, 88, 123, 126, 127, 



157, 167, 172, 173, 181, 197, 219, 

 Ploughing, deep, 51. 



effect of, 46. 



Plumed fruits, 23, 24 (fig.). 



- seeds, 23, 25 (fig.). 



