INDEX 



Abies pectinata, see Fir, Silver 

 Abnormal predisposition to disease, 



9 



Acclimatization of exotics, 288 

 Acer, Dematophora necatrix on, 82 

 Erysiphe bicornis on, 70 

 Nectria cinnabarina on, 96 



ditissima on, 92 

 Rhytisma acerinum on, 105 



punctata on, 106 

 campestre, Septogloeum Hartigi- 



anum on, 141 



platanoides, Mildew on, 70 

 Seedlings, Disease of, 58 

 Acorns, Influence of size of, on growth 



22 



^Ecidium abietinum, 49, 177 



asperifolii, 156 



Berberidis, 155 



Clematitis, 166 



columnare, 49, 161, 184 



conorum Piceae, 183 



coruscans, 183 



elatinum, 51, 179, 195 



pencillatum, 159 



Rhamni, 156 



strobilinum, 182 

 Agaricus adiposus, 180 



melleus, 47, 48, 5, 83, 186, 187, 



207, 245 



Rhizomorphs of, 43 

 Age in relation to disease, 7, 8, 1 1 

 Aglaospora Taleola, 99 

 Air in soil, Circulation of, 275 



wood, 53 

 Alder, see also Alnus 



Nectria ditissima on, 92 



New parasite of, 147 



Polyporus on, 200 



Stigmatea on, 88 



Witches' brooms on, 133 

 Alder-roots, Disease of, 39 

 Algal fungi, 57 

 Almond, see Amygdalus 



Alnus, see also Alder 



Erysiphe guttata on, 70 

 glutinosa, Exoascus alnitorquus 



on, 133 



E. epiphyllus on, 133 

 flavus on, 133 

 incana, Exoascus alnitorquus on, 



133 



E. borealis on, 133 

 epiphyllus on, 133 

 flavus on, 133 



viridis, Valsa oxystoma on, 151 

 Alpine Rose Apples, 186 

 Alternation of generations, 1 54 

 Amygdalus, Polystigma fulvum on, 98 

 communis, Exoascus deformans 



on, 132 



Annuals, Death of, 6 

 Antheridia of Peronosporeas, 58 

 Anthracosis of Vine, 104 

 Anthusa officinalis, ^Ecidium asperi- 

 folii on, 1 56 

 Ants, 203, 245 

 Aphidae on beech, 96 

 Apothecium of Discomycetes, 105 

 Apple, see also Pyrus 

 Apple-trees, Nectria ditissima on, 92 

 Probable bacterial disease of, 



38 



Apricot, Valsa on, 88 

 Arceuthobium Douglasii, 30 



Oxycedri, 30 



Arona, Raestelia cornuta on, 158 

 Arsenic in smoke, 301 

 Arvicola, Barking by, 243 

 Asci, 69 

 Asclepius Vincetoxicum, Cronartimn 



on, 175 



Ascomyces Betulas, 135 

 caerulescens, 135 

 Tosquinetii, 133 

 Ascomycetes, 57, 69, 153, 155 

 Imperfectly known, 135 

 Spore-formation in, 44 



