=Pinoideae.= (Pine family: Conifers) 1-28 =Abietaceae.= 1-22 Abies balsamea, Mill. _Fir balsam, Balsam, Fir_ 20-22 Larix Americana, Michx. _Tamarack, Hacmatack, Larch, Juniper_ 2-4 laricina, Koch. _Tamarack, Hacmatack, Larch, Juniper_ 2-4 Picea alba, Link _White, Cat, Skunk, Labrador spruce_ 16-18 Canadensis, B.S.P. _White, Cat, Skunk, Labrador spruce_ 16-18 nigra, Link. _Black, Double, Swamp, Water spruce_ 12-14 rubra, Link. _Red spruce_ 15, 16 semiprostrata _Dwarf black spruce_ 12 Pinus Banksiana, Lamb. _Jack, Gray, Scrub, Spruce pine_ 8, 9 resinosa, Ait. _Red, Norway pine_ 10, 11 rigida, Mill. _Pitch, Hard pine_ 6, 7 Strobus, L. _White pine_ 4-6 sylvestris, L. _Scotch pine_ 11, 12 Tsuga Canadensis, Carr. _Hemlock_ 19, 20 =Cupressaceae.= 2, 23-28 Chamaecyparis sphaeroidea, Spach. _White cedar, Cedar_ 25, 26 thyoides, L. _White cedar, Cedar_ 25, 26 Juniperus Virginiana, L. _Red cedar, Savin_ 26-28 Thuja occidentalis, L. _Arbor-vitae, White cedar_ 23, 24 Pitch pine. (Pinus rigida. Mill.) 6, 7 Plane tree family. (=Platanaceae=) 110, 111 =Platanaceae.= (Plane tree family) 110, 111 Platanus occidentalis, L. _Buttonwood, Sycamore. Buttonball, Plane tree_ 110, 111 Plum family. (=Drupaceae=) 122-128 Plum, Wild plum. (Prunus Americana, Marsh.) 123, 124, 171 Wild, Red, Horse, Canada plum. (Prunus nigra, Ait.) 122, 123, 171 Poison elder (Rhus vernix. L.) 136, 137 ivy (Rhus toxicodendron) 137 sumac (Rhus vernix, L.) 136, 137 =Pomaceae.= (Apple family) 112-121 Amelanchier Canadensis, Medic. _Shadbush, June-berry_ 116, 117 Crataegus Arnoldiana, Sarg., _Thorn_ 121 coccinea, L,. _Thorn_ 118, 119 coccinea, _var._ mollis, T. & G. 120, 121 Crus-Galli, L. _Cockspur thorn_ 117, 118, 171 mollis, Scheele _Thorn_ 120, 121 punctata, Jacq....._Cockspur thorn_ 118 submollis, Sarg. _Thorn_ 121 subvillosa, Schr. _Thorn_ 120, 121 Malus malus, Britton _Apple tree_ 115 Pyrus Americana, DC. _Mountain ash_ 112, 113 aucuparia _European mountain ash_ 113, 115 communis, L. _Pear tree_ 115 malus, L. _Apple tree_ 115 sambucifolia, Cham. & Schlecht. _Mountain ash_ 113-115 Sorbus Americana, Marsh. _Mountain ash_ 112, 113 sambucifolia, R[oe]m. _Mountain ash_ 113, 115 Poplar, Tulip tree, White wood. (Liriodendron Tulipifera, L.) 104-106 Aspen. (Populus tremuloides, Michx.) 29, 30 Balsam, Balm of Gilead. (Populus balsamifera. L.) 36, 37 Cottonwood. (Populus deltoides, Marsh.) 34, 35 Poplar, Large-toothed aspen. (Populus grandidentata, Michx.) 31, 32 Swamp poplar, Cottonwood, Poplar. (Populus heterophylla, L.) 33, 34 White, Silver-leaved poplar. (Populus alba, L.) 39, 40 Poplar birch. (Betula populifolia, Marsh.) 66-68