6 WILD FLOWERS AND TREES OF COLORADO 



and other factors. Thus the flowering plants of a moist, shaded gulch 

 are not the same as those of a dry, sunny ridge even at the same altitude, 

 and great differences are seen between the plants which fringe an irrigat- 

 ing ditch and those that border a dry country road. 



The limits of the present account will not permit a discussion of the 



Fig. 6. — View on the Platte River near Greeley, Colo. 

 A narrow belt of forest extends along the river bank. The principal trees are broad- 

 leaf cottonwoods, box-elders and alders. 



plants of all the different locations. It will only be- possible to call 

 attention to a few of the most interesting facts in regard to the relation 

 between altitude and plant life and to show by the use of illustrations 

 some of the more striking or notable flowering herbs of the different 

 plant zones. 



