Jennings: The Genus Lactuca. 443 



brown, but mucb mottled with blotches of dark brown, at the apex 

 narrowing to a short, stout beak about 0.5 mm. long, pappus about 

 5 mm. long, tawny, minutely barbed upwardly. Flowers in September 

 to October, rarely in late August. 



In various soils, mostly in moist fertile soils; often an abundant 

 weed in temporarily idle cultivated ground. Specimens have been 

 examined from the following regions: central and western Maryland; 

 central and western Pennsylvania; western and northern West Vir- 

 ginia; and from localities representing practically all portions of 

 Ohio. The color of the flowers, so far as could be determined from 

 the herbarium specimens, was invariably yellowish in all specimens 

 collected in or west of the Appalachians. 



The types, one sheet as to rosette-leaves and the other as to flower- 

 ing stems, flowers, and seeds, are deposited in the Pennsylvania Her- 

 barium of the Carnegie Museum. The types were collected on an 

 idle plot of ground at the corner of Forbes Street and Woodlawn 

 Avenue, Pittsburgh, Pennsylvania, October 2, 1905, by O. E. Jennings 

 and Grace E. Kinzer. 



The variety integrifolia Gray, as described under Lactuca Icuco- 

 phcca, and having "leaves undivided (simulating those of L. acumi- 

 nata, but sessile), or the lowest sinuate-pinnatifid," was founded upon 

 specimens from "Ohio, Lea. Canton, Illinois, Wolf." The type of 

 Gray's variety integrifolia is thus quite likely an entire leaved form 

 of the variety aurca and its disposition would best be as follows: 



Lactuca spicata var. aurea forma integrifolia (Gray) comb. nov. 



Lactuca lencophcca var. integrifolia Gray, Synoptical Flora of North 

 America, I, Part 2, 1886, p. 444. 



Some of the specimens of L. spicata var. aurea collected in the 

 Pittsburgh region show quite evident tendencies toward the entire- 

 leaved form, and in the State Herbarium at Columbus, Ohio, there is 

 a specimen collected in Holmes County, Ohio (Kellerman), and an- 

 other collected in Defiance County, Ohio (Fullmer), in central and 

 northwestern Ohio, respectively, that are clearly typical of forma 

 integrifolia. 



