XVI CONTENTS 



PACE 



Leaf blister-rusts ^"n^ 265 



Leaf-rust 270 



Leaf-cast of white pine 270 



Brown felt-blight 271 



Leaf -cast and witches'-broom of western yellow pine . .271 



Twig-blight 272 



Mistletoe burls and witches'-brooms 273 



Blister-rust of five-needle pines 274 



Sweet-fern rust 281 



ComandrateusS^ 283 



Castilleja rust .• 285 



Oak rust 287 



Pinon blister-rust 290 



Basal canker 290 



Pecky wood-rot 291 



Red-brown sapwood-rot 292 



Brown heartwood-rot 292 



Brown pocket heartwood-rot 293 



Red-ray wood-rot 293 



Red-brown root- and butt-rot 294 



Yellow root-rot 296 



Brown root- and butt-rot 296 



CHAPTER XXVIII 



Poplar Diseases 298 



Leaf-rusts . . ■ 298 



Powdery mildew 300 



Yellow leaf-bUster 300 



Catkin-deformation ' . 301 



Canker 3OI 



Limb-gall 304 



Common white wood-rot 304 



White pocket heartwood-rot 310 



White butt-rot 3IO 



CHAPTER XXIX 



Spruce Diseases 313 



Seedling twig-blight 313 



