132 IVyojning Expei'imcnt Station. 



Tetons, August 21, 1894 (No. 959); Laramie Peak, August 8, 

 1895 (No. 1604). 

 Anaphalis margaritacea subalpina, Gray, Syn. Fl. 233 (1884). 



On a rocky creek bed, Centennial Valley, August 16, 1895 (No. 

 1669). 

 Gnaphalium palustre. Nutt. Trans. Am. Phil. Soc. n. sen vii, 404 

 (1841). 



Not common. Wheatland, August 8, 1891, B. C. Buftum; 

 Atlantic City, September 3, 1894 (No. 1186). 



Iva axillaris, Pursh, Fl. Am. Sept. 743 (1814). 



A troublesome weed in some localities; frecjuent on the sandy 

 plains of the Platte. 



Fairbanks, July 14, 1894 (No. -176). Poverty Weed. 



Iva xanthifolia, Nutt. Trans. Am. Phil. Soc. (II) vii, 347 (1841). 



Infrequent; Willow Creek, July 20, 1894 (No. 569); Cheyenne, 

 August 11, 1891, B. C. Buftum. 



Ambrosia psilostachya, D C. Prodr. v, 526 (1836). 



An exceedingly annoying weed, its root-stocks making it almost 

 impossible to destroy it by cultivation. 



Wheatland, August 11, 1891, B. C. Buffum ; Fairbanks, July 11, 

 1894 (No. 425); Laramie, September 30, 1894. 



Ambrosia trifida, L. Sp. PI. 987 (1753). 

 Infrequent in the state as yet. 

 Ford J. Ranch, on Willow Creek, July 21, 1894 (No. 563). 



Franseria discolor, Nutt. Trans. Am. Phil. Soc. (II) vii, 345 (1841). 

 Gcertneria discolor, (Nutt.) Kuntze. 



One more of our weeds; "the more it is dug up the better it 

 thrives." 



University campus, July, 1891. B. C. Buftum ; Hartville, July 15, 

 1894 (No. 550). 

 Franseria Hookeriana, Nutt. 1. c dcrtneria acanthicarpa, (Hook.) 

 Britton. 



Frequent on sandy plains. 



Inyan Kara Divide, August 30, 1892, B. C. Buft"um ; Big Wind 

 River, August 5, 1894 (No. 707); Sweetwater River, September 9, 

 1894 (No. 1190). 



