Name of Tree 



Relation to Con- 

 tinental Divide 



Zone or Region of Occurrence 



Pinus arista ta. . . . 



edulis 



flexilis 



murrayana . 



scopulorum . 

 Picea engelmanni. , 



parryana 



Pseudotsuga mucronata. 

 Abies concolor 



lasiocarpa 



Sabina monosperma. . . . 



scopulorum 



utahensis 



Populus acuminata 



angustifolia 



balsamifera 



sargentii 



tremuloides 



wislizeni 



Salix amygdaloides 



bebbiana 



exigua 



lasiandra 



nuttallii 



sessilifolia 



Be tula andrewsii 



fontinalis 



Alnus tenuifolia 



Quercus gambelii 



leptophylla 



nitescens 



utahensis 



Celtis douglasii 



reticulata 



Cercocarpus ledif olius . 

 Amelanchier alnifolia. 

 Crataegus chrysocarpa. 



coloradensis 



coloradoides . . . 



doddsii 



erythropoda. . . . 



laurentiana .... 



occidentalis .... 



rivularis 



saligna 



Prunus americana 



melanocarpa 



pennsylvanica . . 

 Robinia neomexicana 

 Acer glabrum 



grandidentum. . . 



interior 



Rhus glabra , 



Rhamnus purshiana. . . 

 Fraxinus anomala 



East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 West 



East and West ( ?) 

 East and West 

 East and West 

 East 



East and West 

 East and West ( ?) 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East 



East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East and West 

 East ( ?) West 



East and West 



West 



East and West 



East 



East 



East 



East 



East and West 



East 



East 



West 



West 



East 



East and West 



East 



East and West ( ?) 



East and West 



East and West 



East and West ( ?) 



East and West 



West 



West 



Montane, Sub-alpine 



Foothill 



Sub-alpine, Montane (Foothill) 



Montane, Sub-alpine (Foothill) 



Foothill, Montane 



Sub-alpine, Montane 



Montane, Foothill 



Foothill, Montane 



Montane, Foothill 



Sub-alpine, Montane (Foothill) 



Foothill (Plains) 



Foothill, Montane, Plains 



Foothill, Plains 



Foothill, Plains 



Foothill, Montane, Plains 



Montane, Foothill 



Plains, Foothill 



Foothill, Montane, Sub-alpine 



Plains, Foothill 



Plains, Foothill (Montane) 



Foothill, Montane, Plains 



Plains, Foothill (Montane) 



Foothill, Plains (Montane) 



Foothill, Montane 



Foothill, Plains 



Foothill (Montane) 



Foothill, Montane 



Foothill, Montane (Plains) 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill, Plains 



Foothill, Plains, Montane 



Plains, Foothill, Montane 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill 



Foothill, Plains 



Foothill, Plains, Montane 



Foothill, Montane, Plains 



Foothill, Plains 



Foothill, Plains, Montane 



Foothill, Montane 



Plains, Foothill 



Foothill, Plains 



Foothill 



Foothill, Plains 



