contorta, 177.
densiflora, 176.
edulis, 178.
excelsa, 172.
flexilis, 173.
inops, 177.
Lambertiana, 172.
Laricio, 175.
Massoniana, 175.
mitis, 176.
monophylla, 178.
monticola, 173.
palustris, 174.
ponderosa, 174.
pungens, 177.
resinosa, 176.
rigida, 174.
strobus, 172.
sylvestris, 177.
Taeda, 174.

Plane, Oriental, 139.

Planera, 135, 136.

Planer-tree, 136.

Plane-tree Family, 139.

Platanaceae, 139.

Platanus, 139.

Plum, 98, 99.

Plum, Date, 120.

Podocarpus, 200, 201.

Poison Dogwood, 90.
Elder, 90.
Sumac, 90.

Pomegranate-tree, 108.

Populus, 167-170.

Poplar, Balsam, 170.
Black, 170.
Carolina, 169.
Downy-leaved, 169.
Lombardy, 169.
Necklace, 169.
White, 168.

Post-oak, 153, 154.

Prickly Ash, 73, 74.

Pride of India, 75.

Prunus, 97-100.

Ptelea, 74.

Pterostyrax, 121.

Pulse Family, 92.

Punica, 108.

Purple Japan Magnolia, 66.

Purple-leaved Birch, 146.

Purple Willow, 165.

Pyramidal Birch, 146.
Oak, 159.

Pyrus, 100-103.

Quaking-asp, 168.

Quassia Family, 76.

Quercitron Oak, 156.

Quercus alba, 153.
aquatica, 157.
bicolor, 154.
Cerris, 159.
coccinea, 156.
falcata, 157.
fastigiata, 159.
heterophylla, 152.
ilicifolia, 157.
imbricaria, 158.
lyrata, 154.
macrocarpa, 153.
Michauxii, 154.
Muhlenbergii, 155.
nigra, 158.
palustris, 156.
pedunculata, 159.
pendula, 159.
Phellos, 152, 158.
prinoides, 155.
Prinus, 154.
Robur, 158.
rubra, 152, 156.
sessiliflora, 159.
stellata, 153.
tinctoria, 156.
virens, 155.

Quince-tree, 102.

Rabbit-berry, 132.

Red Ash, 123.
Bay, 130.
Birch, 147.
Buckeye, 82.
Cedar, 199.
Cherry, 99.
Elm, 134.
Horse-chestnut, 82.
Maple, 85.
Mulberry, 138.
Oak, 156.
Pine, 176.
Plum, 98.

Redbud, 94.

Red-leaved Alder, 148.

Redwood, 193.

Retinospora, 193, 196, 197.

Rhamnaceae, 79.

Rhamnus, 79, 80.

Rhododendron, 117.

Rhus, 89-91.

River Birch, 147.

Robinia, 93, 94.

Rock Elm, 134.
Maple, 86.

Rosaceae, 97.

Rose-acacia, 94.

Rose Family, 97.

Rough Oak, 153.

Round-leaved Maple, 88.

Rowan-tree, 103.