16 Flora of Denver. 



has flowers much larger and is not so stout. Denver. Summer. 



122. CEnothera pinnatifida NUTT (THE COMMON WHITE- 

 FLOWERED EVENING PRIMROSE.) Ascending stems branching 

 from near the ground. Seeds in two rows in each cell. Common 

 on the plains. It has two seasons of blooming. The spring 

 flowers are from plants of the previous year, while the fall are 

 seedlings of the same season. 



123. CEnothera albicaulis NUTT. (WHITE-STEMMED EVEN- 

 ING PRIMROSE.) Tall stems white, branching, calyx tips free 

 in the bud. Flowers white. Along the Platte, and in sandy 

 places in North Denver. Summer. 



124. CEnothera coronopifolia T. & G. (SMALL WHITE 

 EVENING PRIMROSE.) Flowers white, nearly an inch in diam- 

 eter, becoming a bright pink in drying. Stems erect and leafy, 

 with small, pinnate leaves, divisions almost linear. Common. 

 Spring and summer. 



125. CEnothera brachycarpa GRAY. (GOLDEN EVENING 

 PRIMROSE ) Leaves and flowers from a perennial woody root. 

 Flowers yellow, turning purple in fading or drying, very large, 

 three to four inches in diameter. This handsome CEnothera 

 has been found near Sloan's Lake. It is rare around Denver, 

 but abundant on Rooney's Ranch near Morrison. Spring. 



1 26. CEnothera serrulata NUTT. Many erect stems from 

 the woody root. Small yellow flowers numerous and in the 

 upper axils. Along the Platte. Summer. 



127. Gaura parviflora DOUGL. Tall, sometimes five feet. 

 Leafy at base, branching above. Small pink flowers in spikes 

 which become longer in fruit. Common. Summer. 



128. Gaura coccinea NUTT. (RED GAURA.) Low and 

 spreading, flowers pink becoming red. Common. Spring 

 and summer. 



