LIST OF ILLUSTRATIONS 



FIG. PAGE 



15. Annual Knawel (Sderanthus annuus L.) .... 76 



38. ,, Meadow Grass (Poa annua L.) . . -130 



28. Sow Thistle (Sonchus oleraceus L.) . . 100 



45. Beaked Parsley (Anthriscus sylvestris Hoffm.) . . .169 

 33. Bindweed, Black (Polygonum Convolvulus L.) . . .117 



29. ,, Field (Convolvulus arvensis L.) . . . 103 



30. Great (C. sepium L.) . . ... . . . 105 



i. Great, rootstock of 21 



73. Broom-rape (Orobanche minor Sutt.) . . . . . 263 



80. Bryony (Bryonia dioica L.) 293 



7. " Buco " Hand Cultivator 38 



40. Bulbous Buttercup or Crowfoot (Ranunculus bulbosus L.) . 153 



47. Burdock (Arctium Lappa L.) 174 



51. Butter-bur (Petasites vulgaris Desf.) . . . . .183 



95. Canadian Pondweed (Elodea canadensis Michx.) . . 332 



53. Cat's-ear (Hypochceris radicata L.) 190 



ii. Charlock (Sinapis arvensis L.) -59 



21. Cleavers (Galium Aparine L.) 84 



22. Coltsfoot (Tussilago Farfara L.) . . . . .88 



23. infested ground 89 



57. Common Bugle (Ajuga reptans L.) . . . . 200 



64. Sedge (Carex vulgaris Fries.) . . . .215 



78. Corn Cockle (Agrostemma Githago L.) 284 



24. ,, Marigold (Chrysanthemum segetum L.) . . -91 



39. Couch Grass (Triticum repens L.) 133 



i. rootstock of . . . . . .21 



46. Cow Parsnip, Hogweed (Heradeum Sphondylium L.) . 170 



1 6. Crane's-bill, Cut-leaved (Geranium dissectum L.) . . 77 



b 



