62 THE BIOLOGY OF HARDING COUNTY 



402 Erigeron annurts L. Daisy Fleabane. 



On almost bare clay of Little Missouri floodplain, not un 

 common. 



403 Erigeron asper Nutt. 

 Abundant on steppe and table. 



404 Erigeron diver gens T. & G. 

 Infrequent along brooks in the Cave Hills. 



405 Erigeron pumilus Nutt. 



Common on the plains and foothills throughout. 



406 Erigeron new? 

 Frequent on the plains. 



^407 Grindelia perennis A. Nels. Gumplant. 

 Only locally frequent, on the plains. 



408 Grindelia squarrosa (Pursh.) Dunal. Resinweed. 

 Especially abundant on the steppe ; not lacking in the shaded 

 valleys. 



409 Gutierrisia Sarathrae (Pursh) B. & R. 

 A prominent plant in the bad lands. 



410 Leptilon canadense (L.) Brit. Prairie Fire-weed. 

 Abundant on old fields and along roads. 



*4i i Machaeranthera canescens (Nutt.) Gray. 



Abundant in badland areas. In full bloom at the end of 

 August. 



412 Sideranthus grindeliodes (Nutt.) Brit. 

 Frequent on rocky cliffs of buttes. 



413 Sideranthus spinulosus (Pursh.) Sweet. 

 Aplopappus spinulo-sa 



Common on the steppe throughout. 

 *4I4 Solidago concinna A. Nels. Goldenrod. 

 Rare on the steppe. 



415 Solidago elongata Nutt. 



Fairly numerous in the valley of the Little Missouri River. 



416 Solidago missouriensis Nutt. Common Goldenrod. 

 Very numerous on the plains especially in slight draws. 



417 Solidago mollis Barth. Goldenrod. 



Abundant on the steppe, on the tables and on the slopes about 

 the buttes. The most abundant goldenrod of the area. 



418 Solidago nemoralis Ait. 

 Reported by Fromme. 



