442 



tr:^es in winter 



Pine (Continued) 



Gray 214 



Hard 212 



Jack 191, 214 



Key to Species 201 



Northern Scrub 214 



Norway 216 



Pitch 210, 212, 216 



Red 210, 212, 216, 218 



Scotch 214, 220 



Soft 210 



Spruce 214 



Weymouth 210 



White 36, 45, 48, 66, 67, 



74, 134, 210, 212, 216, 220, 236 



Yellow 212 



Pinus 201 



Banksiana 214 



divaricata 214 



Key to Species 201 



Laricio, var. austriaca 218 



resinosa 216 



rigida 212 



Strobus 210 



sylvestris 220 



Pitch Pine 210, 212, 216 



Plane Tree 348 



Planting of Trees 31, 102, 105 



Back yard 93 



Board 107, 108 



Conservaton of scenery .... 61 



Filling- in 107 



For winter effect 72 



In cities 75 



In rural districts 61 



In towns 75 



Making the hole 107 



Park system 62 



Permanent 79 



Plan 72, 90, 94 



Roadside 68 



Seeds 50 



Street trees 105 



Suggestions for city home ... 89 



Temporary 79 



Time of 106 



Plant Lice 150, 166, 175 



Platanus : 



occidentalis 348 



orientalis 348 



Plowrightia morbosa 364 



Plum 49, 53, 55, 170, 207, 364 



American 372, 374 



var. Gold 374 



Canada 372, 374 



Cultivated 374 



European 374 



var. Lombard 374 



Horse 372 



PlumContinued) 



Japanese 374 



var. Red June 374 



Key to Species 207 



Red 372 



Wild 372 



Poetry, tree study in relation to 13 



Poison : 



Dogwood 394 



Elder 394 



Ivy 394 



Sumach 186, 392, 394 



Poplar 36, 41, 45, 47, 48, 50, 53 



103, 110, 122, 132, 134, 162, 171 

 184, 187, 188, 191, 202, 254, 256 



Balsam 100, 254, 256, 238 



Birch 2 86 



Carolina 



9, 41, 46, 79, 80, 96, 153, 188 



189, 190, 193, 254, 256, 260, 262 



Downy Poplar 202 



Key to Species 202 



Lombardy 



45, 79, 193, 254, 256, 260, 262 



Necklace 260 



Silver 252, 254, 256 



Silver-leaf 252 



White 252 



Yellow 340 



Popple 254, 256 



Populus 202 



alba 232 



balsamif era 258 



canadensis 260 



candicans 258 



deltoides 260 



dilatata 262 



fastigiata 262 



grandidentata 256 



heterophylla 202 



Key to Species 202 



monilifera 260 



nigra, var. italica 262 



pyramidalis 262 



tremuloides 254 



Post Oak 36, 298, 300 



Poverty Birch 286 



Propagation 46 



by budding 58 



by cuttings 53 



by graftage 55, 56 



from seeds 46 



nature's way 46 



Pruning : 



Before planting 103 



Shade trees 116 



Time of 118 



Tools 121 



Prunus 186, 207, 372 



americana .... 374 



