138 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Dry ridges in gravel, at an altitude of 2800 m. or more. 



Montana: Old Hollowtop, Pony Mountains, July 7, 1897, Ryd- 

 berg & Bessey, 3g6g : Mountains, near Indian Creek, July 22, jgjS : 

 Mill Creek, 1887, Tzceedy, 228; Lake Plateau, 1897, P. Koch: 

 Little Belt Mts., 1883, Scribncr, 14. 



Yellowstone Park : iSSt^, Ma?'v Compton ; 1884, Tweedy, ij. 



Idaho : Mt. Chauvet, July 27, 1897, Rydhero- tf- Bessey, jg68. 



Oreobroma Nevadensis (Wats.) Howell, Erythea, i : 33 ; Calandrinia 

 Xevadensis A. Gray, Proc. Am. Acad. 8: 623 [Man. R. M. 38; 

 Bot. Cal. I : 75] ; Lezoisia SVevadetisis Robinson ; A. Gray, Syn. 

 Fl. i^ 268. 



Alpine regions, at an altitude of 3000 m. or more. 

 Montana: Yogo, 1888, R. S. Williams, jjo. 



*Spraguea multiceps Howell, Erythea, i : 39 ; Spragiiea unibellaia 



caiidicifera A.Gray, Syn. Fl. i' : 278; S. imibellata Coulter, 



Man. R. M. 39, in part (?). 



Like S. iimbellata, but the caudex branching, each branch bearing 

 a rosulate tuft of thick leaves and a solitary almost naked scape with 

 a globular glomerate inflorescence. In sandy soil, especially on the 

 gevser-formations, at an altitude of 2000-2500 m. 



Montana: Gallatin Co., Mrs. Alderson; Mill Creek, 1887, 

 Tweedy, ij6; Lake Plateau, 1897, P. Koch, j6 and 60. 



Yellowstone Park: 1885, C. W. Letterman, Upper Geyser 

 Basin, Aug. 6 and 8, 1897, RydbergJi- Bessey, jgSj TiwdjgS^; Lower 

 Basin, Aug. ^, JQ82 ; Yellowstone Lake, 1884, Tzceedy, 12; 1871, 

 Haydoi ; Stinking Water, 1873, Parry, 77. 



*Claytonia Virginica L. Sp. PI. i : 204 [Syn. Fl. i' : 271 ; 111. Fl. 



2:3]- 



Like C. Caroliniaiia, but the leaves linear-lanceolate or linear and 



the flowers larger. On hillsides, in rich moist soil, at an altitude of 



2000-3000 m. 



Montana: Bridger Mountains, June 11 and 12, 1897, Rydberg <£- 



Bessey, 3g'j2, 3^73: Electric Peak, Aug. 20, 3973 : Bozeman, 1892, 



W. T. Shaw; Dear Lodge, Miss Emma Ware; Wolf Butte, 1892, 



R. S. Williams, 4.3 : Virginia City, Br. J. D. Heald. 



Claytonia lanceolata Pursh, Fl. Am. Sept. 175 [Syn. Fl. i^ : 271] ; 

 Claytoiia Caroliniana sessilifolia Torr. Pac. R. R. Rep. 4: 70 

 [Man. R. M. 38; Bot. Cal. i: 76]. 



