Osier, 70; Purple Osier, 71. _Plates_ 71, 72
_Picea excelsa_, 155. _Plates_ 159, 160, 163
Pine, Austrian, 162. _Plates_, 166, 167, 168; Chili Pine, 171. _Plate_ 175; Scots Pine, 81. _Plates_ 78, 79, 80; Stone Pine, 160. _Plates_ 164, 165
_Pinus laricio_, 162. _Plates_ 166, 167, 168 " _pinea_, 160. _Plates_ 164, 165 " _sylvestris_, 81. _Plates_ 78, 79, 80
Planes, 128; Oriental Plane, 128; Occidental Plane, 129; Maple-leaved Plane, 131. _Plates_ 134, 135, 136
_Platanus occidentalis_, 129 " _orientalis_, 128. _Plates_ 134, 135, 136
Poplars, 54; White Poplar, 55. _Plates_ 49, 50, 51; Grey Poplar, 55; Black Poplar, 58. _Plates_ 53, 54, 55; Lombardy Poplar, 60. _Plates_ 56, 57, 58; Black Italian Poplar, 61; Balsam Poplar, 61
_Populus alba_, 55. _Plates_ 49, 50, 51 " _balsamifera_, 61 " _canescens_, 55 " _fastigiata_, 60. _Plates_ 56, 57, 58 " _monilifera_, 61 " _nigra_, 58. _Plates_ 53, 54, 55 " _tremula_, 56. _Plate_ 52
_Prunus avium_, 95. _Plates_ 94, 95 " _cerasus_, 97 " _communis_, 92. _Plates_ 92, 93 " _domestica_, 94. _Plate_ 91 " _insititia_, 94 " _padus_, 98. _Plates_ 96, 97, 99
_Pseudotsuga douglasii_, 157. _Plates_ 161, 162
_Pyrus aria_, 103. _Plates_ 107, 108, 109, 110 " _aucuparia_, 106. _Plates_ 111, 112, 113, 114 " _communis_, 98. _Plates_ 100, 102, 103 " _cordata_, 100 " _germanica_, 110. Plate 116 " _latifolia_, 105 " _malus_, 101. _Plates_ 98, 101, 104, 105, 106 " _scandica_, 105 " _sorbus_, 109. _Plates_ 115, 117, 119 " _torminalis_, 105
_Quercus cerris_, 19. _Plate_ 7 " _ilex_, 18. _Plate_ 6 " _robur_, 13. _Plates_ 2, 3, 4, 5, 10
_Rhamnus catharticus_, 90. _Plate_ 89 " _frangula_, 91. _Plates_ 88, 90
_Robinia pseudacacia_, 147. _Plates_ 150, 151, 152
_Salix alba_, 65. _Plates_ 62, 63, 64, 65 " _arbuscula_, 72 " _aurita_, 68 " _babylonica_, 73 " _capræa_, 67 " _cinerea_, 67 " _fragilis_, 63. _Plates_ 59, 60, 61 " _herbacea_, 72 " _lanata_, 71 " _lapponum_, 72 " _myrsinites_, 72 " _nigricans_, 69
_Salix pentandra_, 66. _Plates_ 68, 69, 70 " _phylicifolia_, 70 " _purpurea_, 71. _Plates_ 71, 72 " _repens_, 69 " _reticulata_, 72 " _russelliana_, 64 " _sadleri_, 71 " _triandra_, 65. _Plates_ 66, 67 " _viminalis_, 70
Sallow, 67; Grey Sallow, 68; Eared Sallow, 68
Service, Wild, 105; True Service, 109. _Plates_ 115, 117, 119