80 MINNESOTA BOTANICAL STUDIES. 



Artemisia canadensis Michx. F1. Bor.-Am. 2:129. 1803. 



Reported as growing in Minnesota at the following localities: 

 Lake Superior to the sources of the Mississippi {Houghton, 

 Garrison) ; lake of the Woods {Dawson) ; Red river valley {Scott) ; 

 White Bear, Ramsey county {Kelley). 



The White Bear locality has evidently been destroyed as re- 

 peated search for the plant upon the shores and banks of White 

 Bear and other neighboring lakes has failed to reveal its pres- 

 ence. 



It was found in abundance on the shores of Eagle lake. 

 Otter Tail county, Minn. {E. P. S., Aug. 1892); also on high 

 banks, near Battle lake, Otter Tail county, Minn. {E. P. S., 

 Aug. 1893). 



A specimen from this latter locality was submitted to Mr, M. 

 L. Fernald of the Harvard Herbarium staff, who determines it 

 be the above. 



Petasites palmata (Hook. ) Gray, Bot. Calif. 1 : 407. 1880 

 Abundant at Tower, Vercnilion lake, and Two Harbors, 

 Minn. {Br. J. H. Sandberg, 1885), {E. P. S., June 1893). Col- 

 lected also at Nichols, Aitkin county, Minn. {E. P. S., June, 

 1893). 



Lactuca scariola Linn. Spec. Ed. II. 1119. 1763. 



Not previously reported from Minnesota. 



This plant is evidently of recent introduction as the first 

 plants were noted and collected in 1892 on the river bank near 

 the University of Minnesota, Minneapolis, Minn. {E. P. S., 

 Aug., 1892). During the summer of 1893 it spread so as to 

 become a common weed in the neighborhood of Minneapolis 

 and St. Paul, {E. P. S., Aug., 1893). 



Sonclius arvensis Linn. Spec. 793. 1753. 

 Heretofore reported in Minnesota only from Anoka county, 

 {Juni). It was found in peat bogs near Chaska, Carver county, 

 Minn. (C. A. Ballard, July, 1891); and on the sandy shores of 

 an island in East Battle lake. Otter Tail county, Minn. {E. P. 

 S., Aug,, 1892). 



Hleraciiim longipilum Torr. in Hook. Fl. Bor.-Am. 1:298 



1833. 



Heretofore reported in Minnesota only from St. Croix river 



{Parry); Blue Earth county, {Leiberg). It was collected near 



lake Clitheral and Eagle lake. Otter Tail county, and near 



lake Christina, Douglas county, Minn. {E. P. S., Aug., 1892). 



