( October 23, 1 91 19 12^ 



(24) and North Dakota (25), and it does not find a place in 

 Rydberg's Flora of Colorado ( [906). 



Its advance southward appears to have been slow. In 

 Millspaugh's Descriptive List of West Virginia Weeds (26) it 

 does not have a place, hut a year later he reports a single local- 

 ity (27). About the same time Harper finds that "this weed 

 seems to he obtaining a foothold in Georgia. I collected it in 

 Athens, and saw it in Floyd and Whitfield counties. So far I 

 have seen it only along railroad tracks." (28) Gattinger gives 

 two locations in Kentucky (21)). It is significantly absent from 

 Mohr's exhaustive Plant Life of Alabama (30) and Coulter's 

 Flora of Western Texas (3 1 ). 



The first notice of the appearance of this weed on the Pa- 

 cific coast was in 1891, when Mrs. Brandegee reported it as "be- 

 coming established," and as having been abundant the previous 

 year on the grounds of the State University at Berkeley (32). 

 Two years later it was "becoming common about Lake and up- 

 per Napa counties, and about the Sacramento river," (33) and 

 at "landings and roadsides" on Bouldin Island (34). In all this 

 region it is now very common (35). Its introduction into Cali- 

 fornia, therefore, was not later than 1890, and probably but lit- 

 tle earlier. There is nothing definite to indicate the date of its 

 appearance northward, but ten years after it was first noticed in 

 California it had a good foothold in Oregon and Washington, 

 and was "becoming common." (36) 



(24) Rydb. Fl. Mont. App. 484. 1900. 



(25) Bolley and Waldron, Prelim. List Spermaphyta N. 

 Dak. 639. 1900. 



f26) Bull. W. Va. Agr. Ex. Sta. 23. 1901. 



(27) lb. 24: 396. 1902. 



(28) Bull. Torr. Club 28: 484. 1901. 



(29) Tenn. Fl. 161. 1901. 



(30) Cont. U. S. Xat. Herb. (>: 1901. 



(31) //;. 2: 1892. 



(32) Zoe 2: 77. 1891. 



(33) lb. 4: 154. 1S93. 



(34) rb.Jti 215. 



(35) Jepson, Fl. W. Mid. Cal. 50 1. 1901. 



(36) Howell, Fl. N. W. Am. 404. 1901; Piper and Beat- 

 tie, Fl. Palouse Reg. 180. 1901. 



