plum 
American 
poison-ivy 
poison-sumac 
poplar 
balsam 
bigtooth 
Lombardy 
quaking 
See also: yellow-poplar 
prickly ash 
privet 
pyracantha 
See also: cotoneaster 
quince 
rattan-vine 
redbud 
redcedar, eastern 
See also: juniper 
redgum, See: sweetgum 
rhododendron 
royalpalm, Florida 
sassafras 
serviceberry 
Siberian peashrub, See: caragana 
silktree, See: mimosa 
smilax, See: greenbrier 
sourgum, See: tupelo 
sourwood 
spicebush 
spirea 
spruce 
black 
blue 
Colorado blue, See: spruce, blue 
Engelmann 
Norway 
red 
Sitka 
white 
strawberry 
sugarberry 
sumac 
staghorn 
sweetfern 
sweetgum 
Prunus spp. 
Prunus americana 
Toxicodendron radicans 
Toxicodendron vernix 
Populus 
Populus balsamifera 
Populus grandidentata 
Populus nigra var. italica 
Populus tremuloides 
Zanthoxylum 
Ligustrum 
Pyracantha 
Cydonia oblonga 
Berchemia scandens 
Cercis canadensis 
Juniperus virginiana 
Rhododendron spp. 
Roystonea elata 
Sassafras albidum 
Amelanchier spp. 
Oxydendrum arboreum 
Lindera benzoin 
Spiraea 
Picea 
Picea mariana 
Picea pungens 
Picea engelmannii 
Picea abies 
Picea rubens 
Picea sitchensis 
Picea glauca 
Fragaria 
Celtis laevigata 
Rhus spp. 
Rhus typhina 
Myrica (Comptonia) aspleniifolia 
Liquidambar styraciflua 
