[Vor. 5 
62 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
85 (U. S. Nat. Herb. and Mo. Bot. Gard. Herb.) ; Gray’s Peak, 
alt. 3350-3800 m., 23 July and 15 Aug., 1885, Letterman 
(Mo. Bot. Gard. Herb.); Breckenridge, coll. of 1887, S. D. 
Bereman 750 (Mo. Bot. Gard. Herb.) ; Cripple Creek, alt. 3050 
m., Мау, 1895, Tweedy 356 (U. S. Nat. Herb.) ; Mount Baldy, 
alt. 3400 m., 20 June, 1903, Е. E. € E. S. Clements 298.1 (Gray 
Herb., U. S. Nat. Herb., and Mo. Bot. Gard. Herb.) ; St. Elmo, 
alt. 3030 m., 2 June, 1910, Eggleston 5634 (U. S. Nat. Herb.) ; 
on dry hillsides, Tolland, alt. 2740 m., 21 June, 1914, Overholts 
(Mo. Bot. Gard. Herb.). 
Utah: сайоп above Tropic, alt. 2135 m., 29 May, 1894, M. E. 
Jones 531245 (U. S. Nat. Herb. No. 326831). 
Arizona: San Francisco Mountains, alt. 2740 m., 25 June, 
1891, MacDougal 289 (U. S. Nat. Herb.); DeMotte Park, 
Buckskin Mountains, alt. 2740 m., 19 Sept., 1894, M. E. Jones 
605641 (U. S. Nat. Herb. Хо. 326830) ; Humphrey's Peak, бап 
Francisco Mountains, alt. 2740-3655 m., 7-10 Aug., 1898, Mac- 
Dougal 388 (Gray Herb., U. S. Nat. Herb., Phil. Acad. Nat. 
Sci. Herb., and Univ. Ariz. Herb.) ; Kendrick Peak, near Flag- 
staff, June, 1900, Purpus 8002 (U. S. Nat. Herb. and Mo. Bot. 
Gard. Herb.) ; slopes of San Francisco Mountains, alt. 3000 m., 
7 July, 1901, Leiberg 5661 (U. S. Nat. Herb.), form with both 
glabrous and slightly hirtellous achenes; San Francisco 
Mountains, Мау-Осё., 1902, Ригриз 26 (Mo. Bot. Gard. 
Herb.). 
Var. incertus Greenm. var. nov. 
Heads subdiscoid; outer cycle of flowers 8 to 12, tubular, 
somewhat smaller than the normal flowers of the disk, their 
corollas slender, 3-4-toothed, and bearing imperfect stamens. 
Distribution: known only from the type locality. 
Specimen examined: 
Colorado: Georgetown, coll. of 1875, E. L. Greene (Gray 
Herb.), TYPE. 
109. S. Thurberi Gray, Proc. Acad. Nat. Sci. Phil. p. 68. 
1863; Syn. Fl. N. Am. 1?: 389. 1884, and ed. 2, 1886; Greenm. 
