SUPPLEMENT TO THE FLORA OF MONTANA. 61 



branching inflorescence. Has the leaves and general habit of Nuttal- 

 lii, but the flowers are smaller, with petals about 6 mm. long and 

 apparently white. 



Hallett's Ranch, Helena, Aug. 15, 1892, E. N. Brandegee. 



CRASSULACE^E. 



Sedum frigidum, Rydberg, Bull. Torr. Bot. Club, 28:283. The 

 American forms of S. Rhodiola, DC. (S. roseum, Scop.) are thus sep- 

 arated as a distinct species. 



Sedum subalpinum, n. sp. 



Perennial, 5-10 cm. high, glabrous, except the leaves, branching 

 from the base : leaves terete, sometimes flattened, 4-7 mm. long, usu- 

 ally densely pulverulent under a lens, mainly aggregated in basal 

 rosettes : cymes contracted, 2-4 cm. in diameter : petals 5 mm. long, 

 equalling the short, thick, erect follicles : bracts, sepals and petals 

 often purplish. Rocky ledges in alpine and subalpine situations, 

 Sooo feet and upwards, passing below into S. stenopctalum. Colorado 

 and Oregon, northward in the mountains. 



S. stcnopetalum, Pursh, is distiguished from this species by its 

 greater size (10-18 cm.), fewer basal rosettes: leaves 8-12 cm. long: 

 cymes diffuse and divisions divergent, 4-8 cm. in diameter: petals 

 8 mm. long, equalling the erect, slender follicles, and it is found in 

 the lower mountains from 3-8000 feet. The smaller size, more abun- 

 dant basal rosettes, smaller leaves, cymes, flowers and fruit and 

 higher altitude readily separate subalpinum from this species, though 

 the two appear to have been confounded in most herbaria. 



Sperry Glacier, 8000 ft., Sept. i, 1903; Beef Straight, Jefferson 

 Co., June 30, 1902; Mt. Hyalite, Gallatin Co., 10,000 ft., Aug. i, 

 1902; Horsefly Pass, Crazy Mts., 8200 ft., July 20, 1902; Mt. Bridg- 

 er, 8500 ft., July u, 1903; Monida, 7000 ft., June 26, 1902. 



PAPAVERACEJE. 



Argemone alba, Lesteb. Apparently native in the eastern 

 plains. Custer Station, June 23, 1890; Forsyth, July 24, 1901; Mey- 

 ers, 1902. 



Papavcr nudicaulc arcticnm, Elkan. ; Rydberg, Flora, 475. Is 

 P. pyginaeiiin below. 



Papaver pygmaeum, Rydberg, Bull. Torr. Bot. Club, 29:159; 

 P. nndicaule arcticum, Rydberg, Flora, 475. Also at Sperry Glacier, 

 Sept. i, 1903, 8000 ft. 



