MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 38 1 



On sandy plains and hills, up to an altitude of looo m. 

 Montana: Great Falls, 1891, R. S. Williams, 7?. 

 Yellowstone Park : 1873, C. C. Parry, 7/7. 



* Chrysopsis depressa. 



Intricately branched, from a woody caudex ; stems less than i dm. 

 high, densely short-pilose, very leafy: leaves seldom over i cm. 

 long, obovate or spatulate, on very short petioles, divaricate, densely 

 grayish strigose ; heads on naked peduncles about i cm. long, small, 

 7-10 mm. high ; bracts linear, acute, puberulent, in about 3 rows, 

 one-third shorter than the disk ; achenes silky strigose. 



A species belonging to the C. villosa group ; distinguished by 

 the tufted habit, small leaves and small pedunculate heads. On 

 hot-spring formations. 



Yellowstone Park: Lower Geyser Basin, August 4, 1897, 

 Rydberg & Bcssey, jody. 



* Pyrrocoma carthamoides Hook. Fl. Bor. Am. i : 307 ; Aplopap- 



piis carthamoides Gray, Proc. Acad. Sci. Phila. 1863: 65 [Syn. 



Fl. I-: 126]. 



Somewhat resembling P. integrifolia in habit, but with broad ob- 

 long to lanceolate and more or less mucronate-tipped leaves. Dry 

 plains and hills, up to an altitude of 1500 m. 



Montana: Columbia Falls, Mrs. J. J. Kennedy, 16; Ignatius 

 Mission, 1883, Canby, idy. 



Pyrrocoma integrifolia (Porter) Greene, Erythea, 2 : 69 ; Aplofap- 



pits intco-nfolins Porter; Gray, Proc. Am. Acad. 16: 79 [Syn. 



Fl. I-: 128; Man. R. M. 146]. 



Mountain meadows and hillsides, up to an altitude of 2000 m. 



Montana: Deer Lodge, i860, Dr, Cooper; Gallatin River, 

 1886, Tweedy, iiij; Beaver Head Co., 1888, 2J2; Jack Creek, 

 June 18, 1897, Rydberg & Bessey, 505J ; Silver Bow Co., Mrs. 

 Jennie H. Moore-, Helena, 1887, R. S. Williams, joS ; Judith Gap, 

 1882, Canby ; Grasshopper Valley, 1880, Watson, i88j; Melrose, 

 1895, Rydberg, 28og. 



Pyrrocoma lanceolata (Hook.) Greene, Erythea, 2 : 69 ; Donia 

 lanceolata Hook. Fl. Bor. Am. 2 : 25 ; Aplopappus lanceolatus 

 Torr. & Gray, Fl. N. Am. 2: 241 [Syn. Fl. i" : 129; Man. R. 

 M. 147]. 



Plains and hillsides, up to an altitude of 1500 m. 

 Montana: Sun River, 1887, R. S. Williams, 707. 



