26o 
EDWIN BLAKE PAYSON 
D. saximontana A. Nels. Bull. Torrey Club 27: 264. 1900. 
D. oligosperma was described as having white flowers and it is 
certain that in D. andina the flowers are yellow. Since there seems 
to be no other difference, however, the two species are merged. 
Specimens Examined. — British Columbia: Carbonate Draw, 
July 13, 1904, /. Macmillan, no. 297; Canmore, Ry. Mts., June 29, 
1885, Macoun; Silver City, Ry. Mts., Aug. 3, 1885, Macoun; N. Fork 
of Old Man's River, Aug. 10, 1883, Macoun. Idaho: Sawtooth 
National Forest, 1910, C. N. Woods, no. 80; Boise, Wilcox. Mon- 
tana: Monida, Madison Co., June 16, 1899, A. Nelson E. Nelson, 
no. 5423; Bridger Mts., June 15, 1897, Rydherg &f Bessey, no. 4181; 
Bridger Mts., June 4, 1901, W. W. Jones; Bridger Canyon, May 15, 
1901, /. Moore; Little Belt Mts., Aug. 10, 1896, Flodman, no. 498; 
Bridger Canyon, Bozeman, May 27, 1899, Blankinship; June, 1894, 
Mrs. Moore; Mt. Bridger, June 26, 1899, Blankinship; Bridger Mts., 
June 15, 1897, Rydherg & Bessey, no. 4180 (this seems to be nearly 
typical oligosperma; its flowers are white). Nevada: Ruby Hill, 
July 7, 1 891, Jones; Bunker Hill, Toiyabe Range, July 29, 1913, 
Kennedy, no. 4184. Utah: Logan Peak, Cache Co., July 4, 1910, 
Charles Piper Smith, no. 2245. Wyoming: Bush Ranch, Sweetwater 
Co., June 10, 1900, A. Nelson; Golden Gate, Yellowstone Park, June 
28, 1899, A. Nelson &' E. Nelson; Laramie Hills, Albany Co., June 3, 
1900, A. Nelson, no. 7019; Laramie Hills, Albany Co., May 30, 1898, 
A. Nelson, no. 4323; Laramie Hills, June 21, 1892, B. C. Buffum, 
no. 65; Kemmerer, June i, 1907, A. Nelson, no. 9027; Laramie Hills, 
June, 1893, A. Nelson, no. 3237; T. B. Ranch, Carbon Co., June 20, 
1 901, Goodding, no. 58; Telephone Mines, Albany Co., Aug. i, 1900, 
A. Nelson, no. 7873; Laramie Hills, May, 1895, A. Nelson, no. 1223; 
sandy hilltops, Laramie, May 25, 1910, A. Nelson, no. 9334; Freezeout 
Hills, July 10, 1898, E. Nelson, no. 4487; La Plata Mines, Aug. 29, 
1898, E. Nelson, no. 5246; Gros Ventre Fork, June 8, i860, Hayden; 
West Slope of Wind River Mts., June 6, i860, Hayden; gravelly hills 
in Wind River Valley, May 15, i860, Hayden; near Mammoth Hot 
Springs. Yellowstone Park, June, 1893, Burglehaus; Yellowstone 
Park, 1885, Tweedy, no. 567; near South.Gap, June, 1873, Parry, no. 11. 
D. pectinata (S. Wats.) Rydb. Bull. Torrey Club 39:327. 1912. 
D. glacialis var. pectinata S. Wats. Proc. Amer. Acad. 23: 260. 1888. 
These seem according to specimens labeled by Rydberg in the Gray 
Herbarium to be referable to D. oligosperma. 
