246 



INDEX 



Fungi and insects, protection 

 against, 196 



as factors of disease, 155 

 Fungous diseases attacking cav- 



* ities, 172 



diseases, spraying for, 160 

 Fungus, fruiting body of, 156 



Gingko biloba, 55, 120, 124 



or maidenhair tree, 55, 120 

 Gipsy moth, 74, 143 

 Gleditsia triacanthos, 102 

 Gloeosporium nervisequum, 62 

 Gray or white birch, 64 

 Grazing effect on forests, 196 

 Grove and lawn, study of soil 



conditions on, 239 

 Gum, red or sweet, 95, 231 

 Gymnocladus dioicus, 120 



Hackberry tree, 59, 70 

 Hackmatack, 29 

 Hard maple, 38 

 - pines, 224 

 "Hardwoods," or broadleaf trees, 



226 



Hardy catalpa, 102 

 Harvesting forests, 196 

 Harvesting of forests to increase 



production, 180 

 Hawthorn, English, 128 

 Healthy tree, conditions which 



indicate, 153 

 Heartwood, 106, 219 

 Heat, effect of, on trees, 116 

 Hemlock, 17, 128, 225 

 and spruce, description of, 11 

 Hickory, 229 



bark borer, 85, 151 

 , bigbud, 87 



, bitternut, 87 



, broom, 87 



, brown, 87 



, mockernut, 44, 86 



Hickory, pignut, 87 

 , shagbark, 83 

 , shellbark, 85 

 , whiteheart, 87 

 Hicoria alba, 86 



glabra, 87 



minima, 87 

 - ovata, 83 



Honey locust, 102 

 Hop hornbeam, 70 

 Hornbeam, (blue beech), 70 

 Horsechestnut, 33, 120 

 , red, 34, 121 

 Humus, 113, 207 

 Hydrophytes, 111 



Important insects, 141 

 Improperly pruned trees, 161 

 Indian bean, 104 



Individuality of trees, 1, 182, 239 

 Insects and fungi, protection 



against, 196 

 , boring, 22, 134 

 , chewing, 134 



galls, 71 



, important kinds of, 141 



injurious to trees, 134 

 , leaf-eating, 49 



, methods of destroying injuri- 

 ous, 134 



, nature, habits and influences 

 of, 239 



, sucking, 134 



, the four stages, or life his- 

 tory of, 140 



Iron wood tree, 59, 70 



Italian or Lombardy poplar, 51, 

 128 



Japanese maple, 122 



umbrella pine, 123 

 Juglans cinerea, GO 



nigra, 87 

 Juniper, 22 



