2 20 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Montana: Elk Mts., 1896, Flodman, 602; Spanish Basin, 6oj ; 

 Bozeman, 60^; Bridger Mts., 6o_^ ; Jack Creek, July 14-15, 1897, 

 Rydberg & Besscy, 4352 and 4333; Spanish Basin, June 23-28, 

 4354^ 4355^ 4356 and 4338; Bridger Mts., June 17, 4337; Boze- 

 man, 1887, 7\i'cedv, 12; Smith River, 1883, Scrihner, 42. 



* Drymocallis pseudorupestris R3-dberg, Mem. Dept. Bot. Cohimbia 



Univ. 2: 194; Potciitilla pseudorupestris Rydberg, Bull. Torr. 



Bot. Club, 24: 250; Potentilla glandulosa JVevadensis Wats. 



Bot. Cal. I : 178, in part. 



Resembles somewhat the preceding, but the plant is low, only 

 1-3 dm. high, the cyme open, with ascending branches and few large 

 white flowers, and the leaves small and very glandular. It is an 

 alpine plant, growing at an altitude of 2500-3200 m. 



Montana: Little Belt Mts., id>(^6, jFlodnia}i, 3^8, 3gg and 601; 

 Spanish Basin, 600; Bridger Mts., June 15 and 18, 1897, Rydberg 

 & Bessey, 433^ and 4361 ; Pony, July 7, 4362; Electric Peak, Aug. 

 18, 4364; Spanish Basin, June 24, 4360; Yogo, 1888, R. S. ]ViI- 

 liajiis, 734; Gallatin Co., Mrs. Alderson ; Deer Lodge, 1888,/^. 

 D. Traphageii. 



Yellowstone Park: Mammoth Hot Springs, 1885, Tzveedy, 

 469. 



Idaho: Mt. Chauvet, July 29, 1897, Rydberg & Bessey, 4363. 



* Drymocallis pseudorupestris intermedia. 



Taller and less glandular than the species, sometimes 5 dm. high ; 

 growing at an altitude of about 2000 m. 



Montana: Spanish Basin, 1896, Flodman, jg^ J Ji^me 28, 1897, 

 Rydberg & Bessey, 4363. 



* Drymocallis glutinosa (Nutt.) Rydb. Mem. Dept. Bot. Columbia 



Univ. 2: 196; Potentilla glutinosa Nutt.; Torr. & Gray, Fl. N. 

 Am. I : 446. 



Like D. glandulosa, but stouter and with much larger flowers. 

 It belongs to the region west of the Rockies, but the following speci- 

 men is doubtfully referred here. 



Montana: Bridger Mts,, 1896, Flodman, 3g6. 

 Drymocallis glandulosa (Lindl.) Rydberg, Mem. Dept. Bot. Colum- 

 bia Univ. 2: 198; Potentilla glandulosa Lindl. Bot. Reg. 19: 

 pi. 1383 [Man. R. M. 83 ; Torr. & Gray, Fl. N. Am. i : 446]. 

 Rather rare in valleys and on hillsides, at an altitude of about 

 2000 m. 



