JOHNSON: A REVISION OF THE SECTION BORAPHILA 31 



Saxifraga saximontana E. Nelson, Erythea 7:168. 1899. 

 Micranthes saximontana (E. Nelson) Small, N. Am. Fl. 22:2:145. 

 1905. 



(Plate X.) 



Distribution. — Rocky Mountains of British Columbia and Alberta to the Yellow- 

 stone National Park, with outposts in the Wallowa Mountains of eastern Oregon, and 

 in the Black Hillsi of South Dakota. 



Specimens examined : 



Wyoming: under a cliff, Yancey's Yellowstone National Park, July 17, 1899, A. 

 and E. Nelson, No. 5917 (type) (MBG 84383, USNH 365280, UMH) ; rich marly hills 

 in Jackson's Hole, Snake Fork, expedition of Capt. W. F. Reynolds, U,S.A., 1859-60, 

 alt. 6,000 ft, June 12, 1860, Dr. F. V. Hayden (MBG 8419, MBG 84140). 



Idaho: granite ledges, Kootenai County, June, 1891, /. B. Leiberg, No. 82 

 (UMH) ; mountains, Kootenai County, July, 1889, /. H. Sandherg (UMH) ; moun- 

 tains, Kootenai County, July, 1889, /. H. Sandherg (MBG 84278) ; Little North Fork ^ 

 Basin, alt. 1,000 m,, September 4, 1895, /. B. Leiberg, No. 1640 (MBG 84600). 



Oregon : Little Fork, Wallowa Mountains, July 12, 1897, E. P. Sheldon, No. 8536 

 (USNH 528321), referred to S. aequidentata by Engler and Irmscher. 



Montana: Spanish Creek, Gallatin County, /. Vogel (USNH 416291), 1901, 

 referred to 5". Allenii (Small) Engl, and Irmsch. by Engler and Irmscher. 



South Dakota : Black Hills, near Fort Meade, May 6, 1887, W. H. Forwood, 

 No. 121, referred to 5", Allenii (Small) Engl, and Irmsch. by Engler and Irmscher 

 (USNH 317662). 



The following specimens from the United States National Herbarium 

 are considerably stouter, but in other respects are similar to the above. They 

 have a heavier and, in earlier stages, a more thyrsoid inflorescence, but 

 otherwise show the variations in the margins of the leaves as the above. 

 In floral characters they are identical. 



Alberta: vicinity of Banff, alt. 5,300-7,000 ft., July 7, August 4, 1899, W. S. ^_, 

 McCalla, No. 2290 (USNH 368516), referred to ^. Allenii (Small) Engl, and Irmsch. 

 by Engler and Irmscher. 



Montana: foothills, Midvale, June 18, 1903, L. M. Umback, No. 100a, referred to 

 S. Allenii (Small) Engl, and Irmsch. (USNH 541458) ; Duck Lake, June 23, 1901, 

 Stuart Weller (USNH 411603), referred to S. Allenii (Small) Engl, and Irmsch. 

 This form possesses crenately toothed leaves and a stout scape with rather compact 

 cymules. 



The following specimens from the Selkirks and the Canadian Rockies 

 are also here referred to this species, with reservation. 



BRrrrsH Columbia : Carbonate Draw, July 13, 1904, C. H. Shaw, No. 302, T. R. 

 Snyder (MBG 84110, UMH). These two sheets show the obvious differences in haibit 

 assumed by this species. The Minnesota Herbarium specimens would be easily mis- 

 taken for S. rhomboidea. 



Washington : near Whistler Pass, East Fork of Pasayton River, Okanogan 

 Forest, Okanogan County, alt. 2,340 m., August 4, 1916, Eggleston, 13416 (USNH 

 886307). Cymules at first compact. Some of the leaves are brownrpubescent beneath. 



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