[392] 



North American Trees 



Pondcypress, 93 

 Poplar, 120 



Balm-of-Gilead, 127 



Balsam, 127 



Black, 123 



Carolina, 125 



Gray, 123 



Lombardy, 123 



White, 123 

 Populus, 120 



X acuminata, 129 



alba, 123 



angustifolia, 129 



balsamifera, 127 



balsamifera subcordata, 127 



X canadensis, 125 



X canescens, 123 



deltoides, 125 



fremontii, 125 



fremontii wislizenii, 125 



grandidentata, 123 



heterophylla, 125 



Key to species, 121 



nigra, 123 



nigra italica, 123 



X parryi, 125 



palmeri, 125 



sargentii, 125 



tacamahacca, 127 



tremuloides, 123 



trichocarpa, 127 

 Port-Orford-cedar, 103 

 Possumhaw, 291 

 Prickly-ash, 285 

 Prosopis juliflora, 271 



odorata, 271 



pubescens, 271 

 Prunus, 256 



alleghanensis, 257 



americana, 265 



amygdalus, 256, 259 



angustifolia, 257 



armeniaca, 256, 259 



avium, 256, 259 



caroliniana, 258 



ccrasus, 256, 259 



domestica, 256, 265 



emarginata, 263 



hortulana, 257 



ilicifolia, 258 



insititia, 256, 265 



Key to species, 257 



lyonii, 258 



mahaleb, 256 



mexicana, 257 



munsoniana, 257 



myrtifolia, 258 



nigra, 265 



pensylvanica, 263 



persica, 257, 259 



serotina, 261 



spinosa, 256 



subcordata, 257 



triloba, 256 



umbellata, 257 



virginiana, 261 



virginiana demissa, 261 



virginiana melanocarpa, 261 

 Pseudotsuga macrocarpa, 63 



menziesii, 63 



taxifolia, 63 



taxifolia glauca, 63 

 Ptelea angustifolia, 285 



trifoliata, 285 

 Pyrus communis, 244 



Quercus, 174 

 agrifolia, 2 1 1 

 alba, 181 

 arizonica, 209 

 arkansana, 178 

 bicolor, 191 

 borealis, 193 

 catesbaei, 201 

 chapmani, 175 

 chrysolepis, 213 

 chrysolepis palmeri, 213 

 coccinea, 197 

 douglasii, 185 

 dumosa, 178 

 durandii, 175 

 ellipsoidalis, 199 

 emoryi, 209 

 engelmanni, 178 

 falcata, 195 



falcata pagodaefolia, 195 

 gambelii, 185 

 garryana, 187 

 georgiana, 177 

 graciliformis, 174 

 gravesii, 174 

 grisea, 174 

 harvardii, 174 

 hypoleuca, 213 

 hypoleucoides, 213 

 ilicifolia, 176 

 imbricaria, 205 

 incana, 205 



