246 IOWA ACADEMY OF SCIENCE Vol. XXVI, 19191 



Specimens examined : 



Iowa: Ames, Miss Marie Rccs, 1918; Paiiuiicl and Ma.viccll, 1911 ; 

 IV. S. Dudgeon, 1904, 2 sheets; 5'. W. Beyer, 1888; Rolfs, 1897, 

 2 sheets; D. C. McKune, 1916; Cratty, 1918; Kelly, Pearl Clayton, 

 1911, 3 sheets; Panimcl and Maxivcll, 1911 ; Frazer. Panimcl; Og- 

 den, Paiiiiiicl, 1898; Slater, Rembrandt and Fawcett, 1902; High 

 Lake, Emmet County, Shimek, 1895; Winnebago County, Sliimek, 

 1895; Emmet County, IVolden, 1916; Des Moines, McKiine, 1916; 

 Salem, Pammel, 1917, 2 sheets; Arnold's Park, Pammel, 1913 ; West 

 Bend, Crai/v, 1919. 



North America : Illinois — Pullman, Pammel, probably introduced. 

 Wisconsin — Madison, Pammel, 1913 ; LaCrosse, Pammel, 1889. 

 Kansas — Wichita, Dr. Andrezvs, 2 sheets. SoiitJi Dakota — Water- 

 town, Pammel, 1918, 



6. Lactuca pulchclla (Pursh) D. C. Prod. 7 : 134 (1838) Large 

 Flowered Blue Lettuce. 



Perennial, glabrous throughout, and somewhat pale and glaucous, 

 two to four feet high ; leaves sessile, oblong or linear-lanceolate, en- 

 tire or the lower runcinate-pinnatitid. Heads few and large, eight to 

 ten lines high, the outer successively shorter, and ovate-lanceolate. 

 Akenes oblong-lanceolate and nearly twice as long as their beaks. 



Frequent in moist soil, having the widest range of any native 

 American sjiecies ; Ontario to British Columbia and south to Michi- 

 gan, Kansas, New Mexico and California. It is quite rare as a 

 native of Iowa, but is becoming quite commonly introduced through- 

 out the state as an impurity in timothy seed. Being a perennial it is 

 less easily eradicated than most of the other species, and is reported 

 to be a pernicious weed in some sections. Its handsome blue flowers 

 make it our most beautiful species of the genus. 



Specimens examined : 



loiva: Fremont County. Fitzpatrick, 1898; Boone. Geo. Carver, 

 1890; Sioux City, Pammel, 1895, 2 sheets; Armstrong, Cratty, 1901. 

 2 sheets; Turin, Pammel, 1904; Wallingford. IVolden, 1916; Mount 

 Pleasant, Mills: Osceola County, Fitcpatrick, 1904; Montgomery 

 County, Fitzpatrick, 1898; Fremont County, Fitzpatrick, 1898; 

 O'Brien County. lordan, 1919; Arcadia, Pammel, 1919; Paullina, 

 Yockey, 1919 ; Primghar, Bernsten, 1919. 



North America : Minnesota — Star Island, Cass County. Pammel, 

 1914; International Falls. Kellogg, 1914. South Dakota — Brookings, 

 Pammel, 1918; Spear Fish Canon. Miss King. North Dakota — 

 Sheldon, 1889. N eh r ask a— McCook, Pammel, 1895; Callaway, 



