750 WEED FLORA OP IOWA 



1911; Harlan, Shelby county, Buena Vista county, and Clay 

 county, 1912 (Pammel) ; Sac county, 1912 (Lee) ; Storm Lake, 

 1912 (Rehnstron) ; Dickens, 1912 (Evans) ; Smithland, 1912 (Bar- 

 ber) ; Cartersville, 1912 (Connor). 



; Hawkweed (Hieracium floribunduin) . 



This weed, reported from Cutler, Maine, in 1902, now occurs in 

 fields from New Bruns-wick to eastern Maine. 



Paint Brush {Hieracium mirantiacum) . 



Paint brush was cultivated as an ornamental plant in Maine in 

 1875 and became frequent in the New England states and New 

 York in the early eighties. It is now distributed from eastern 

 Quebec to Pennsylvania and occasionally in Iowa. 



Cat's-ear {Hypochaeris radicata). 



According to Pernald this appeared in Penzance and Wareham, 

 Massachusetts, in 1899; since then it has spread to other New 

 England localities, as New Bedford and Dartsmouth. It had been, 

 however, a very troublesome weed of lawns of the Pacific north- 

 west for some time previously. It was abundant in Portland, 

 Oregon, in 1906. 



Stinking Willie (Senecio jacobaea). 



Femald (1905) states that in the late 70 's a coarse yellow 

 flowered plant {Senecio jacobaea) appeared as a waif on ballast 

 at some points along Northumberland Strait in eastern New Bruns- 

 wick. In 1884, it had begun to spread along the local railroads 

 and now has reached Portland, Maine. The seventh edition of 

 Gray's manual (1908) gives its distribution from Newfoundland 

 to New Jersey. 



Barnaby's Thistle or Knapweed {Centaur ea solstitialis) . 



This weed was not reported in the sixth edition of Gray's 

 manual (1889) nor in Britton's manual (1901). In the seventh 

 edition of Gray's manual, Robinson and Pernald state, "Waste 

 ground, eastern Massachusetts to Ontario and Iowa." It was re- 

 ported from Iowa as early as 190.3, and since, a few times each 

 year, in alfalfa fields as follows : Paton, 1903 (Lundell) ; Maple- 

 ton, 1904 (Perrin) ; Moville, 1905 (Morton) ; Des Moines, 1907 



