22 Flora of Denrer. 



172. Erfgeron glabellus NUTT. Tall, leafy-stemmed, heads 

 nearly an inch in diameter, rays blue, numerous. Rare along 

 the Platte but common in the mountains. Summer. 



173. Erigeron pumilus NUTT. Low with many stems from 

 the root, very hairy, heads glomerate, flowers clustered at tops 

 of the stems. Common on the plains. Spring. 



174. Erigeron compositus PURSH. var. trifidus GRAY. 

 Forming mats on gravelly hills, the white-rayed heads on scape- 

 like peduncles. It has two seasons, blooming early in thespring 

 and also in the fall if the season is not too dry. Riverside cem- 

 etery. North Denver. 



175. Erfgeron canus GRAY. Stems several from the root 

 from 6 in. to a foot high. Entire plant canescent with fine 

 white appressed hairs. Rays white or pink. Near Berkeley, 

 not common. Spring to summer. 



176. Erigeron flagellaris GRAY. Easily distinguished by 

 the long prostrate runner-like stems which root at the joints* 

 flowers small, rays white or pink-tipped. Along the Platte 

 and Cherry Creek. May and June. 



177. Erfgeron Bellidiastrum NUTT. Diffusely branching, 

 annual. Small heads very numerous, rays pale blue. Common. 

 Summer. 



178. Erigeron strigosus MUHL. Annual, from one to 

 three feet high, slender and branching near the top. Heads 

 small, rays white. Along the Platte. Summer. 



179. Erigeron Canadensis L. Annual, flowers very small 

 and numerous, rays inconspicuous. A common weed. Sum- 

 mer to fall. 



180. Erigeron divaricatus MICHX. With very small pur- 

 plish rays, numerous branches ascending. 



