x LIST OF ILLUSTRATIONS 



FIG. 



29. Single fructification of Fomes a nnosus. Upper surf ace facing page 85 



30. Lower surface 85 



31. Fomes annosus. Annular rot with a central unfotted 



core . . . . . . . . ,,92 



32. Fomes annosus. Figured rot . ,,92 



33. Black specks in wood of larch caused by Fomes annosus . page 94 



34. Transverse section of black speck in wood of larch . 96 



35. Longitudinal section near edge of black speck . . 97 



36. Fomes annosus. Figured arrangement of rot . . facing page 99 



37. ,, ,, Base of larch trunk excavated 



underneath . . . . ,,99 



38. Fructification showing pores in 



longitudinal section . 101 



39. Under surface of fructification 



showing mouths of pores . . 101 



40. Upper surface of fructification showing concentric 



furrows and white margin ...... 101 



41. Fomes annosus . . . . . . . page 102 



42. Diagram showing necessity for pores to be vertical . . 103 



43. Fomes annosus. Conidiophore and conidia 105 



44. 45. Cultures of Fomes annosus .... facing page 108 



46. Polyporus Schweinitzii. Stipitate fructification . 127 



47. . Bracket-shaped fructification 127 



48. Hymenial layer of Polyporus Schweinitzii . . . page 128 

 49, 50. Sections of larch- tree showing rot caused by 



Polyporus Schweinitzii ..... facing page 128 



51. Piece of larch wood rotted by Polyporus Schweinitzii ,, 130 



52. Section of Scots pine stem with rot caused by Poly- 



porus Schweinitzii . . . . . . ,,130 



53. Mycelium of Polyporus Schweinitzii in wood of larch . -page 131 



54. Section of larch wood after attack by Polyporus Schweinitzii 132 



55. Poria vaporaria .. . . . . . . 136 



56. 57. Sections of larch wood rotted by Trametes Pini . facing page 143 

 58, 59. Armittaria mettea. Group of toadstools growing 



from base of deodar . . 145 

 60, 61. Toadstools growing from rhi- 



zomorphs in soil . . 146 



