x LIST OF ILLUSTRATIONS 



FIG. PAGE 



21. BULBOUS BUTTERCUP (Ranunculus bulbosus) - - - - 37 



22. MOUSE-EAR HAWKWBED (Hitracium pilose I la) - 39 



23. CREEPING BUTTERCUP (Ranunculus rtpens) 40 



24. ONION COUCH (Arrhenatherum avenaceum) ----- 41 



25. SEEDLING OF CREEPING THISTLE (Cirsium arvtnse) - - 82 



26. DODDER (Cuscuta trifolii), parasitic on Clover 93 



27. BROOMRAPE (Orobanche minor), parasitic on Sainfoin. Right. "\ 



Sainfoin plant not attacked. Left. Sainfoin plant attacked by ! face 

 broomrape, showing the harmful effect on growth - p. 96 



28. BROOMRAPE (Orobanche minor), parasitic on Lucerne - - - ' 



29. YELLOW RATTLE (Rhinanthus major), parasitic on Oats - 100 



30. SECTION ACROSS BARLEY ROOT PENETRATED BY SUCKER OF YELLOW 



RATTLE (Rhinanthus major) 101 



32. AUTUMN CROCUS (Colchicum auiumnale) 109 



33. PURGING FLAX (Linum catharticum) 109 



34. CROW GARLIC (Allium vineale) - 113 



35. RAMSONS (Allium ursinum) 113 



36. SPURRY (Spergula arvensis) - - 142 



37. ANNUAL KNAWEL (Scleranthus annuus) 143 



38. SHEEP'S SORREL (Rumex acetosella) 144 



39. CORN MARIGOLD (Chrysanthemum segetum) ..... 1^5 



40. QUAKER-GRASS (Briza media) 180 



41. PLANTS COMMON IN TRODDEN PLACES 



A. Greater Plantain (Plantago major) - 184 



B. Silverweed (Potentilla anserina) ...... 184 



C. Rough-stalked Meadow-grass (Poo trivialis) - - - 184 



