20 Flora of Denver. 



153. Liatris punctata HOOKER. (PRINCE'S-PLUME.) Stem 

 simple, leaves linear, stiff and spreading, purple flowers in a 

 dense spike, pappus plumose. On the plains. Fall. 



154. Gutierrezia Euthamiae T. & G. Many stems from 

 near the root, leaves narrowly linear, more glutinous around 

 the cymes of small yellow heads; pappus chaffy. Along the 

 Platte in the fall. 



155. Grindelia squarrosa DUNAL. (GUM-PLAXT, ROSIN- 

 WEED.) Erect. Involucre very viscid and with recurved tips, 

 flowers yellow. Common until late in the fall. 



156. Chrysopsis villosa NUTT. (GOLDEN ASTER.) Many 

 stems from the root, hairy, yellow flowers clustered near the 

 ends of the stems. Common on the plains. Summer and fall. 



157. Aplopappus rubiginosus TORR <^GRAY. Resembling 

 Grindelia squarrosa. Erect, paniculately branched, leaves 

 spiny-toothed, viscid with glandular hairs. Easily distin- 

 guished from the Grindelia by the bristly pappus. North 



Denver. Riverside cemetery. Summer and fall. 



. 



158 . Aplopappus spinulosus DC. Stems branching from 

 base, ascending, lobes of the pinaate leaves and bracts of the 

 involucre bristle-tipped. Common on the plains. Summer to 

 fall. 



159. Bigelovia graveolens GRAY. Shrubby and bushy, 

 leaves and stems usually white, yellow flowers clustered in 

 cymes at the ends of stems. Common on the plains. Fall. 



160. Solidago Canadensis L. (THE TALL GOLDEN-ROD.) 

 Along ditches and streams. Summer to fall. 



161. Solidago nemoralis AIT. var. incanaGRAY. Low with 

 leaves an inch or more wide, not decreasing much upwards. 

 Inflorescence more compact. Along the Platte. Suinmer to 

 all. 



