INDEX. 83 



Page 



Rot. heart, white, ages of trees liable to infection 33 



ash, cause, description, and prevention 46-47 



cause and nature, characteristic signs 25-26 



fungus, distribution 28-29 



effect on wood structure 34-35 



hosts, susceptibility of different trees ' 26-27 



influence of environment, factors favorable to development. 31-33 



method of infection and spread 29-31 



prevalence, influence of environment 31-33 



preventive measures 35-37 



ultimate fate of diseased trees 33-34 



piped, oak and chestnut, description and growth of disease 39-40 



sap, birch, caused by Polyporus betulinus, description 51-52 



caused by Daedalea quercina, description 61 



Fomes applanatus, description 58-60 



Polystictus pergamenus, description 56-58 



versicolor, description 53-56 



Cottonwood, cause and description of decay 58-60 



fungi causing, description 49-61 



soft, oaks, cause, description, and growth 41-42 



white, cause, trees affected, and description of fungus 48-49 



caused by Hydnum crinaceus, description 44-45 



Polyporus squamosus, description 48-49 



Rots, root, causes, symptoms, and destruction of trees 22-24 



sap, caused by wound fungi, description 49-52 



species of deciduous trees 52-61 



Rusts, forest trees, description and control 19-20 



Salix spp. See Willow. 

 Sap-rot. See Rot, sap. 



Saplings, forest trees, susceptibility to sulphur-gas injury 11 



Saprophytes causing diseases of trees 14-25 



Scarlet oak. See Oak, scarlet. 



Schuman, K., and K. Lauterbach, reference to work 28 



Scrub pine. See Pine, scrub. 



Season checks in timber, entrance of sap-rotting fungi 54, 55, 65 



Shelf fungi, description and injuries to trees 25-61 



Slime-flux diseases, description 24-25 



Smelters, injuries to trees from fumes 10-12 



Smoke, injuries to trees 10-12 



Soil, conditions producing disease 12-13 



injuries by gas and smoke 12 



Spanish oak. See Oak, Spanish. 



Spartina cynosuroides, occurrence of Fraximus lanceolata 19 



Sporophores of Daedalea quercina, description 61, 74 



Fomes fomentarius, description 50, 74 



igniarius, formation 30 



Polyporus betulinus, description 51, 74 



obtusus, characteristics 41 



Polystictus pergamenus, description 58 



versicolor, growth and description 53-56 



Spots, leaf, forest trees, caused by fungi 20-21 



Stag-headed condition, causes in soil conditions 13 



149 



