MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 455 



a winged petiole, their bases covered more or less on the upper 

 surface with brown fibers; head about 1.5 cm. high; involucres 

 somewhat livid, the outer consisting of a single row of ovate close 

 bracts, the inner of lanceolate sometimes slightly corniculate bracts. 

 Montana: Sheridan, 1892, Airs. L. A. Fitch (in the herbarium 

 of the Montana Agricultural College, at Bozeman). 



Taraxacum scopulorum (Gray) ; Taraxacum officinale scopulorutn 



Gray, Syn. Fl. i- : 440 [Man. R. M. 223]. 



On the tops of the highest mountains, at an altitude of nearly 

 3000 m. 



Montana: East Boulder, 1887, Tweedy, joj ; Old Hollowtop, 

 Pony Mts., July 9, 1897, Rydberg ($• Bessey, 5294- 



Yellowstone Park : Soda Butte Creek, 1885, Tzveedy, yji. 



Sonchus asper (L.) All. Fl. Ped. i: 222 [111, Fl. 3: 272; Syn. Fl. 

 1^: 444; Bot. Cal. I : 443 ; Man. R. M. 223] ; Sonchus oleraceus 

 asper L. Sp. PL 794. 

 In waste places ; introduced. 

 Montana: Salesville, 1892, W. T.Shazv. 



Lactuca pulchella (Pursh) DC. Prod. 7: 134 [111. Fl. 3: 275 ; Syn. 



Fl. I-: 443 ; Bot. Cal. I : 442 ; Man. R. M. 223] ; Sonchus -pul- 



chellus Pursh, Fl. Am. Sept. 502. 



In meadows, up to an altitude of 2500 m. 



Montana: Helena, 1889, F. D. Kelsey ; Belt River, 1881, R. 

 S. Williams, yi ; Bear Creek Canon, 1892, W. T. Shazv ; Pony 

 Mts., July 8, 1897, Rxdbcrg & Bessey, 5^77; Madison Valley, 1871, 

 Hayden Survey; 1883, Scribner, ijga. 



Yellowstone Park: 1894, 7^. H. Burglehaus, 750; Yellow- 

 stone Lake, 1885, Tzveedv, 757. 



Lactuca Ludoviciana (Nutt.) DC. Prod. 7 : 141 [111. Fl. 3 : 273 ; Syn. 

 Fl. I': 443; Man. R. M. 223]; Sonchus Ludovicianus Nutt. 

 Gen. 2 : 125. 



On river-banks and in wet meadows, up to an altitude of 2000 m. 

 Montana: Tenderfoot Creek, 1890, R. S. Williams, 842. 



* Lygodesmia spinosa Nutt. Trans. Am. Phil. Soc. (II.) 7 : 444 [Syn. 



Fl. i^: 436; Bot. Cal. i: 441]. 



A diffuse straggling spinescent perennial, with linear leaves, the 

 uppermost reduced to small scales. Grows on gravelly hills and 

 plains, up to an altitude of 2000 m. 



