248 IOWA ACADEMY OF SCIENCE Vol. XXVI, 191') 



larger than those of L. villosa, the bracts with tapering points; the 

 most striking difference, however, is in the shape of the akenes. 



Specimens examined : 



loiva: Ames, Ball, 1897; Paimnel, 1910; Keosauqua, McDonald, 

 1907; Des Moines, Carver, 1895; Decatur County, Anderson, 1904; 

 Lee County, Bartsch, 1895; Des Moines County, Fitspatrick, 1896; 

 Decatur County, Fitzpatrick, 1897 and 1898 ; Johnson County, Fits- 

 patrick, 1894, 1896, 1900; Van Buren County, Fitzpatrick, 1896; 

 Council Bluffs, Miss Cavcnaugh, 1898; Mount Pleasant, Mills; Des 

 Moines County, Bartsch, 1895; Jackson County, Shinick, 1894; Iowa 

 City, Somes, 2 sheets ; Madison County, Pammel, 1919. 



North America: Missouri — Allenton, Letterman, 2 sheets; St. 

 Louis, Grccneman. Illinois — Urbana, Trclcasc, 2 sheets. Wiscon- 

 sin — Prescott, Miss Edgar. Nebraska — Cass County. 



8. Lactuca spicata (Lam.) Hitch., St. Louis Acad. Sci. 5:506 

 (1891). L. lencophoca A. Gray., Prod. Am. Acad, 19:73 non Sib- 

 thorp (1840). Mulgedimn lencophocmn D. C, Prod. 7:250 (1838). 

 Tall Blue Lettuce. 



A stout stemmed annual or biennial, leafy up to the rather dense 

 panicle. Leaves irregularly pinnatifid or runcinate, coarsely toothed, 

 the upper stem leaves sessile or auriculate clasping. Flowers bluish 

 or cream color. Akenes short beaked, the copious pappus tawny. 



Common, Maine to Minnesota and Alaska, south to North Caro- 

 lina and Tennessee. Infrequent in Iowa in moist soil. 



Specimens examined: 



lozva: Fayette. C. C. Parker; Winneshiek County, Goddard, 2 

 sheets ; Des Moines, Paul Bartsch. 



North America : Illinois — Urbana, Trclcase, 1916. Wisconsin, 

 Allen, 2 sheets. Minnesota — Hennepin County, Burglehaus, 1891 ; 

 Coleraine, Cratty, 1919. Kentucky — Bell County, T. H. Kearney, 

 Jr., 1893. Michigan — Mackinac Island, very common and the only 

 species observed, Cratty. 1919. Alaska — Haines, /. P. Anderson, 

 Plants of Alaska. No. 890. Aug. 21, 1918. 

 Herbarium Iowa State College. 



