xxiv Illustrations 



I>LATE FACING PAGE 



74 Hieracium umbellatum L. Narrow- 

 Leaved Hawkweed ./*;., . . ... 276 



74 Agoseris aurantiaca (Hook.) Greene. 276 



75 Erigeron acris L. Blue Fleabane . 288 



75 Erigeron salsuginosus (Rich.) A. Gray. 



Large Purple Fleabane . .. . 288 



75 Saussurea densa Hook. Saussurea . 288 



76 Erigeron discoideus Rydb. , ' J/ 292 



76 Erigeron melanocephalus A. Nelson. 



Black-Headed Fleabone *"'."! r '; 1 292 



76 Erigeron multifidus Rydb. Cut- 



Leaved Fleabane . . ' ' itr ^ 2 ^ 2 



77 Aster Lindleyanus T. & G. '. '. 298 



78 Erigeron aureus Greene. Golden 



Fleabane . . .' . "' ^'^ 302 



78 Gaillardia aristata Pursh. Great- 



Flowered Gaillardia .' * ' ^ ' ' ' ' . 302 



79 Arnica cordifolia Hook. Heart-Leaved 



Arnica '. . . .;* " '.. 304 



79 Arnica louiseana Farr. Pale-Flowered 



Arnica :i . " . ' ' ; v ' l -\ : - ^ ^04 



