INDEX 



329 



Smoke, Special liability to injury from, 



H 



Smut, Formation of spores of, 66 

 Popular use of the term, 66 

 of Wheat, how spread, 49, 67 



Smuts, Protection of. against drought, 



45 



Snags of branches, 254, 260 



Snow, Damage due to, 299 



Soda-fumes, Effects of, 300 



Soil-canker, 129 



in relation to disease, 10, 270 



Solutions in soil, Effects of strong, 

 279 



Soot, Effects of, 300 



Sorauer's work, 4 



Sorbus, ^Ecidium pencillatum on, 159 

 Melampsora on, 171 

 Raestelia cornuta on, 158 

 Aucuparia, Cucurbitaria on, 88 



Spear-top, 175 



Sphacelia segetum, 99 



Sphaceloma ampelinum, 104 



Sphaerella, Leaf-blotches due to, 88 

 Fagi, 88 

 Fragariae, 88 

 maculiformis, 88 

 punctiformis, 88 



Sphaeria dryina, 224 



Sphaerotheca pannosa, 70 



Spheroblasts on the beech, 239 



Sporangia of Peronosporeae, 57 



Spore-mother-cells, 162 



Spores, how formed, 43 

 Germination of, 45 

 Infection by, 48 



Sporidia, 154 

 of smut, 67 



Sporocarp of Basidiomycetes, 153 



Sporophore of Fungi, 43 

 Peronosporeas, 57 

 Pezizae, 117 



Spruce, see also Picea 



yEcidium abietinum on, 177 



coruscans on, 183 



Chrysomyxa abietis on, 175 



Ledi on, 179 



Dematophora necatrix on, 82 

 Green-rot on, 42, 224 

 Herpotrichia nigra on, 76 

 Hysterium macrosporum on, 109 

 Nectria Cucurbitula on, 89 

 Parasitic disease of, 147 

 Pestalozzia Hartigii on, 136 

 Peziza asruginosa on, 224 

 Polyporus borealis on, 196 

 Trichosphaeria parasitica on, 72 



Spruce, Withering of leaves of, 1 1 1 



cones, /Ecidium strobilinum on, 

 182 



conorum Piceseon, 183 



leaf blister, 9, 13, 175 

 redness, 109 

 rust, 175 



Spruces as a protection against pine- 

 blight, 116 



Stag-headed condition, 270 

 Starved plums, 131 

 Stem-brand, 68 

 Stereum hirsutum, 205 

 Sterigmata, 142 

 Sticky-brand, 68 

 Stigmatea, Leaf-blister due to, 88 



Alni, 88 



Mespili, 88 

 Stink-brand, 68 



Stone-fruit trees, Black-knot of, 103 

 Strawberrry, Sphaerella on, 88 

 Stumps of branches, 254, 260 

 Sucker-tubercles of fungi, 42 

 Sulphurous acid in smoke, 301 

 Sun, injurious effects on conifers, 112 



cracks, 283, 294, 296 

 Swarm-spores of Peronosporeas, 57 

 Swellings induced by fungi, 50 

 Sycamore, see Acer 

 Symbiosis, 71, 181 



Tannin as food for fungi, 50 

 Taphrina aurea, 135 



betulina, 133 



Populi, 135 



Tar-girdles, Effect of, on pines, 246 

 Tarring wounds, 258 

 Teleutospore, 154 

 Temperature of trees, 283 

 Teratology defined, 5 

 Thelephora laciniata, 35 



Perdix, 54, 203 



Thinning woods, Effects of, 271 

 Thrushes as distributors of mistletoe, 



26, 30 



Thunder brooms, see Witches' brooms 

 Thymus, Dodder on, 35 

 Tidiness, Importance of, 57 

 Tilletia Caries, 68 



laevis, 68 

 Timber, Coniferous, Blue colour of, 224 



Structural, Attack of fungi on, 212 



Merulius lacrymans in, 219 

 Tinder-fungus, 206 

 Tinea sylvestrella, 175 

 Toad-stools, 46 

 Tobacco, Parasite of, 25 



