postelsfa 37 



the failing rain lets them wither to 

 yellow or brown. If one be among 

 the hills, many minor changes of color 

 are to be seen. The pale blue Pul- 

 satillas are followed by yellow wall 

 flowers and Physarias, these, as sum- 

 mer draws on, by pink Phloxes, blue 

 Pentstemons, the yellow Thermopsis, 

 pink Geraniums, purple Erigerons and 

 Lacinarias and yellow Senecios. Per- 

 haps the most beautiful and striking 

 plants of the lower foothills are the 

 Eriogonums, such as E. zimbellatum 

 and E. hallii with large umbels of yel- 

 low flowers. Whole hillsides, at one 

 time blue with Pentstemon, shine forth 

 soon after with the brilliant lemon yel- 

 low hue of Eriogonum. 



In the canons and gulches of the 

 foothill region the hackberry, box elder, 

 poplar, sumac, gooseberry {Ribes spp.), 

 poison ivy {Rhus rydbergii), Edwinia, 



