MEMOIRS OF THE NEW YORK BOTANICAL GARDEN.. 221 



Montana: Spanish Basin, July 28, 1897, Rydberg & Bcssey, 

 ^366; Granite, 1892, F. D. Kelsey. 



Yellowstone Park : 1884, Tivcedy, loi. 



* Drymocallis fissa (Nutt.) Rydberg, Mem. Dept. Bot. Columbia 



Univ. 2 : 197 ; Potentilla fissa Nutt. ; Torr. & Gray, Fl. N. Kxw. 



i: 446. 



Like D. giandulosa, but low, 2-3 dm. high, with a dense cyme and 

 large flowers 15-20 mm. in diameter. It belongs mainl}^ to a more 

 southerly region ; growing in the mountains at an altitude of over 

 2500 m. 



Yellowstone Park: 1885, C. W. Lettennan, ij6. 



Chamaerhodos erecta (L.) Bunge ; Ledeb. Fl. Alt. i: 429 [Torr. 



& Gray, Fl. N. Am. i: 433; Man. R. M. 86; Rydberg, Mon. 



205] ; Stbbaldia erecta L. Sp. PI. 284. 



Dry plains, at an altitude of 1000-2000 rn. 



Montana: Park Co., 1889, Tzveedy ; Cottonwood Creek, 1896, 

 Flodmaii, 6oy ; Hounds Creek, 1883, Scribner, jy ; Madison Valley, 

 187 1, Flavdcii. 

 Geum strictum Ait. Hort. Kew. 2 : 207 [Torr. & Gray, Fl. N. Am. 



I : 421 ; Man. R. M. 82 ; HI. Fl. 2 : 221] . 



Among bushes and in damp meadows, up to an altitude of 2500 m. 



Montana: Cliff Lake, July 27, 1897, Rydberg d- Besscy, 4.40'/; 

 Spanish Basin, June 21,, 4406; Cottonwood, 1892, W. T. S/iazv ; 

 Swimming Women Creek, 1882, Canby. 



* Geum Oregonense (Scheutz) Rydberg, Bull. Torr. Bot. Club, 25: 



56 ; Geum iirbaniim Oregonense Scheutz, Nov. Act. Soc. Sci. 



7: 26. 



In habit intermediate between G. macrofhylhini and G. stricttun; 

 differs from both in its smaller and lighter yellow petals, smaller 

 heads of achenes and glandular-puberulent lower portion of the 

 styles. It is the most common species in Montana, growing in 

 meadows up to an altitude of 2700 m. 



Montana: Cliff Lake, July 27, 1897, Rydberg & Bessey, 4412; 

 Bridger Mts., June 10-18, 4410 and 441 1 ; Spanish Basin, June 28, 

 440Q; Jack Creek, July 15, 4408; Deer Lodge, Miss Emma Ware; 

 Bozeman, 1887, Tzveedy, 7; Smith River, 1883, Scribner, jg. 



Yellowstone Park: Tower Falls, 1885, F. Tzueedy. 

 Geum rivale L. Sp. PI. 501 [Torr. & Gray, Fl. N. Am. i: 422; 



Man. R. M. 82; 111. Fl. 2: 219]. 



